DP Physics Questionbank

Description

Overview of essential ideas for this option

C.1: The progress of a wave can be modelled via the ray or the wavefront. The change in wave speed when moving between media changes the shape of the wave.

C.2: Optical microscopes and telescopes utilize similar physical properties of lenses and mirrors. Analysis of the universe is performed both optically and by using radio telescopes to investigate different regions of the electromagnetic spectrum.

C.3:  Total internal reflection allows light or infrared radiation to travel along a transparent fibre. However, the performance of a fibre can be degraded by dispersion and attenuation effects.

Directly related questions

• 18M.3.SL.TZ1.9c.iii: Explain how the use of a graded-index fibre will improve the performance of this fibre optic system.
• 18M.3.SL.TZ1.9c.ii: Calculate the power of the output signal after the signal has travelled a distance of 3.40 km in...
• 18M.3.SL.TZ1.9c.i: Draw on the axes an output signal to illustrate the effect of waveguide dispersion.
• 18M.3.SL.TZ1.9b: The use of optical fibres has led to a revolution in communications across the globe. Outline two...
• 18M.3.SL.TZ1.9a: Calculate the critical angle at the core−cladding boundary.
• 18M.3.SL.TZ1.8b: A system consisting of a converging lens of focal length F1 (lens 1) and a diverging lens (lens...
• 18M.3.SL.TZ1.8a.iii: Light passing through this lens is subject to chromatic aberration. Discuss the effect that...
• 18M.3.SL.TZ1.8a.ii: The lens is 18 cm from the screen and the image is 0.40 times smaller than the object. Calculate...
• 18M.3.SL.TZ1.8a.i: Identify whether the image is real or virtual.
• 18M.3.SL.TZ2.10c: In many places clad optic fibres are replacing copper cables. State one example of how fibre...
• 18M.3.SL.TZ2.10b.iii: The graph shows the variation with wavelength of the refractive index of the glass from which the...
• 18M.3.SL.TZ2.10b.ii: An amplifier can increase the power of the signal by 12 dB. Determine the minimum number of...
• 18M.3.SL.TZ2.10b.i: Calculate the maximum attenuation allowed for the signal.
• 18M.3.SL.TZ2.10a: An optic fibre of refractive index 1.4475 is surrounded by air. The critical angle for the core –...
• 18M.3.SL.TZ2.9c: Distinguish between this mounting and the Newtonian mounting.
• 18M.3.SL.TZ2.9b: This arrangement using the secondary mirror is said to increase the focal length of the primary...
• 18M.3.SL.TZ2.9a: Identify, with the letter X, the position of the focus of the primary mirror.
• 18M.3.SL.TZ2.8b: The diagram shows an incomplete ray diagram which consists of a red ray of light and a blue ray...
• 18M.3.SL.TZ2.8a.ii: calculate the linear magnification.
• 18M.3.SL.TZ2.8a.i: determine the focal length of the lens.
• 18M.3.HL.TZ2.13c: It is proposed to build an array of radio telescopes such that the maximum distance between them...
• 17N.3.SL.TZ0.9c.iv: The screen is now correctly positioned to form a focused image of point R. However, the top of...
• 17N.3.SL.TZ0.9c.iii: A screen is positioned to form a focused image of point Q. State the direction, relative to Q, in...
• 17N.3.SL.TZ0.9c.ii: Calculate the vertical distance of point Q′ from the principal axis.
• 17N.3.SL.TZ0.9c.i: On the diagram, draw two rays to locate the point Q′ on the image that corresponds to point Q on...
• 17N.3.SL.TZ0.9b.ii: State three characteristics of the image.
• 17N.3.SL.TZ0.9b.i: Determine the position of the image.  
• 17N.3.SL.TZ0.9a.ii: State the maximum possible distance from an object to the lens in order for the lens to produce...
• 17N.3.SL.TZ0.9a.i: Sketch a ray diagram to show how the magnifying glass produces an upright image.  
• 17N.3.HL.TZ0.15b: Outline how the combination of core and cladding reduces the overall dispersion in the optic fibres.
• 17N.3.HL.TZ0.15a: Calculate the maximum angle β for light to travel through the fibre. Refractive index of core   ...
• 10N.3.SL.TZ0.G2c: In an astronomical telescope the objective is often made up from a diverging and a converging...
• 10N.3.SL.TZ0.G2b: In a particular astronomical telescope, the eyepiece lens has a power of 40 dioptres and the...
• 10N.3.SL.TZ0.G2a: (i)     label, with the symbol \({F_{\text{E}}}\), the position of the other focal point of the...
• 10N.3.SL.TZ0.F2c: (i)     The signal shown below is fed into a monomode optical fibre. On the diagram above,...
• 10N.3.SL.TZ0.F2a: State what is meant by material dispersion.
• 17M.3.SL.TZ2.9c: State two advantages of the use of satellite-borne telescopes compared to Earth-based telescopes.
• 17M.3.SL.TZ2.9b: The telescope is used to form an image of the Moon. The angle subtended by the image of the Moon...
• 17M.3.SL.TZ2.9a: Determine the focal length of each lens.
• 17M.3.SL.TZ2.8c: Two parallel rays are incident on a system consisting of a diverging lens of focal length 4.0 cm...
• 17M.3.SL.TZ2.8b: Explain your sketch in (a)(i).
• 17M.3.SL.TZ2.8a.ii: On the diagram, sketch the wavefront in air that passes through point P. Label this wavefront Y.
• 17M.3.SL.TZ2.8a.i: On the diagram, sketch the part of wavefront X that is inside the lens.
• 17M.3.SL.TZ2.10b.ii: The length of the optic fibre is 5.1 km. The input power of the signal is 320 mW. The output...
• 17M.3.SL.TZ2.10b.i: Identify the features of the output signal that indicate the presence of attenuation and...
• 17M.3.SL.TZ2.10a: The diagram shows a ray of light in air that enters the core of an optic fibre. The ray makes...
• 17M.3.SL.TZ1.8c: State and explain why it is an advantage for the core of an optic fibre to be extremely thin.
• 17M.3.SL.TZ1.8b: A signal with an input power of 15 mW is transmitted along an optic fibre which has an...
• 17M.3.SL.TZ1.8a.ii: Suggest why infrared radiation rather than visible light is used in these transmissions.
• 17M.3.SL.TZ1.8a.i: State two advantages of optic fibres over coaxial cables for these transmissions.
• 17M.3.SL.TZ1.7c: By reference to chromatic aberration, explain one advantage of a reflecting telescope over a...
• 17M.3.SL.TZ1.7b.ii: The angular diameter of the Moon at the naked eye is 7.8 × 10–3 rad. Calculate the angular...
• 17M.3.SL.TZ1.7b.i: Explain why, for the final image to form at infinity, the distance between the lenses must be...
• 17M.3.SL.TZ1.7a.iv: On the diagram draw rays to locate the focal point of L2. Label this point F.
• 17M.3.SL.TZ1.7a.iii: The distance between the lenses is 18 cm. Determine the focal length of L2.
• 17M.3.SL.TZ1.7a.ii: Show that the image of the object formed by L1 is 12 cm to the right of L1.
• 17M.3.SL.TZ1.7a.i: State what is meant by a virtual image.
• 16N.3.SL.TZ0.13d: The diagram shows a schematic view of a compound microscope with the focal points fo of the...
• 16N.3.SL.TZ0.14b: Explain why graded-index fibres help reduce waveguide dispersion.
• 16N.3.SL.TZ0.14a: State the main physical difference between step-index and graded-index fibres.
• 16N.3.SL.TZ0.13e: Image 1 shows details on the petals of a flower under visible light. Image 2 shows the same...
• 16N.3.SL.TZ0.13c: There are optical telescopes which have diameters about 10 m. There are radio telescopes with...
• 16N.3.SL.TZ0.13b: A student has four converging lenses of focal length 5, 20, 150 and 500 mm. Determine the maximum...
• 16N.3.SL.TZ0.13a: Compare the focal lengths needed for the objective lens in an refracting telescope and in a...
• 16N.3.SL.TZ0.12d: The lens is moved to a second position where the image on the screen is again focused. The...
• 16N.3.SL.TZ0.12c: Calculate the focal length of the lens.
• 16N.3.SL.TZ0.12b: Determine the distance between the lamp and the lens.
• 16N.3.SL.TZ0.12a: Identify the nature of the lens.
• 16N.3.SL.TZ0.11b: The incident ray shown in the diagram makes a significant angle with the optical axis. (i) State...
• 16N.3.SL.TZ0.11a: A ray of light is incident on a converging mirror. On the diagram, draw the reflection of the...
• 16M.3.SL.TZ0.11b: Explain how the graded-index optic fibre reduces waveguide dispersion.
• 16M.3.SL.TZ0.11a: Draw the path of the ray as it travels through the graded-index optic fibre.
• 16M.3.SL.TZ0.10c: A student decides to reverse the positions of the same lenses without changing the separation to...
• 16M.3.SL.TZ0.10b: Outline why sign convention is necessary in optics.
• 16M.3.SL.TZ0.10a: Calculate the magnification of this telescope.
• 16M.3.SL.TZ0.9c: Outline the advantage of parabolic mirrors over spherical mirrors.
• 16M.3.SL.TZ0.9b: Estimate the linear magnification of the image.
• 16M.3.SL.TZ0.9a: Construct a ray diagram for object O. Label the image I.
• 14M.3.SL.TZ2.18c: (i)     State the separation of the objective lens and the eyepiece lens. (ii)     Determine the...
• 14M.3.SL.TZ2.18b: (i)     Define the term near point. (ii)     Outline the advantage of having the image...
• 14M.3.SL.TZ2.17b: (i)     Determine, using the data, the greatest distance the signal can travel before it must be...
• 14M.3.SL.TZ2.17a: State what is meant by attenuation.
• 14N.3.SL.TZ0.20b.ii: Outline why reducing the size of the aperture will reduce the effects of spherical aberration.
• 14N.3.SL.TZ0.20b.i: The lens is covered with a wide aperture. Using the diagram, sketch the likely appearance of the...
• 14N.3.SL.TZ0.20a.iii: Identify the nature of the image.
• 14N.3.SL.TZ0.20a.ii: Construct rays to locate the position of the image.
• 14N.3.SL.TZ0.20a.i: Define principal axis.
• 14N.3.SL.TZ0.19b: The input power to the fibre is 150 mW. The attenuation per unit length of the glass fibre is...
• 14N.3.SL.TZ0.19a.ii: The diagram shows a straight optic fibre. Sketch the passage of a ray of light through the fibre.
• 14N.3.SL.TZ0.19a.i: Calculate the critical angle for this optic fibre.
• 15N.3.SL.TZ0.20b: Anna uses the same lens with an illuminated object. She finds that a clear image of the object is...
• 15N.3.SL.TZ0.20a.ii: Anna places a screen at the image position. Outline why she cannot see an image on the screen.
• 15N.3.SL.TZ0.20a.i: On the diagram, construct rays to locate the image of the arrow. The focal points of the lens are...
• 15M.3.SL.TZ2.20b: Argus uses an astronomical telescope to observe a telecommunications tower. The height of the...
• 15M.3.SL.TZ2.20a: (i) Using the diagram, determine the power of the lens. (ii) On the diagram, construct lines to...
• 15M.3.SL.TZ2.18c: State one effect of dispersion on a pulse that has travelled along an optic fibre.
• 15M.3.SL.TZ2.18b: In an optic fibre the refractive index of the core is 1.62. The refractive index for the cladding...
• 15M.3.SL.TZ2.18a: Explain, with reference to the critical angle, what is meant by total internal reflection
• 15M.3.SL.TZ1.21d: Describe how the effects of chromatic aberration may be reduced.
• 15M.3.SL.TZ1.21c: The object is coloured and the image shows chromatic aberration. Explain what is meant by...
• 15M.3.SL.TZ1.21b: (i) Deduce the magnification of the lens. (ii) State and explain the nature of the image formed...
• 14M.3.SL.TZ1.18a: (i) On the diagram above, construct a ray diagram to locate the position of the image formed by...
• 14M.3.SL.TZ1.18b: The compound microscope in (a) is in normal adjustment so that the final image is formed at the...
• 14M.3.SL.TZ1.19a: Electromagnetic waves propagating in a medium suffer dispersion. Describe what is meant by...
• 13M.3.SL.TZ1.19a: Calculate the greatest angle of incidence θ that can be used with this fibre.
• 13M.3.SL.TZ1.19b: Sketch the path of the light in the core on the diagram above.
• 13M.3.SL.TZ1.20a: An object is placed 0.10 m in front of the lens. (i) On the diagram, construct rays to locate...
• 13M.3.SL.TZ1.20b: The object in (a) is now moved so that it is located 0.40 m from the lens. Calculate (i) the...
• 13M.3.SL.TZ1.20d: The refractive index of the glass in the lens is greater for blue wavelengths than for red...
• 12M.3.SL.TZ1.18b: (i) Describe the pattern produced on a screen by a red laser beam incident on a diffraction...
• 12M.3.SL.TZ1.17a: (i) Define the angular magnification of a magnifying glass. (ii) Derive an equation for the...
• 12M.3.SL.TZ1.17b: An object is positioned 8.00 cm from a magnifying glass of focal length 15.0 cm. (i) Calculate...
• 11M.3.SL.TZ2.20a: Define angular magnification.
• 11M.3.SL.TZ2.20b: A thin converging lens of focal length 4.5 cm is to be used as a magnifying glass. The observer...
• 11M.3.SL.TZ2.20c: Suggest two reasons why, for high magnifications, a combination of lenses is used rather than a...
• 11M.3.SL.TZ2.19b: A single lens is used to form a magnified real image of an object. Explain, with reference to the...
• 12N.3.SL.TZ0.19a: State one advantage of the use of an optic fibre rather than a coaxial cable for the transmission...
• 12N.3.SL.TZ0.19c: A signal is fed into an optic fibre of length L. The noise power at the receiver is Pnoise=4.2...
• 12N.3.SL.TZ0.21c: The lens has a focal length f. When the image is formed at the near point, the distance u of the...
• 12N.3.SL.TZ0.21d: A compound microscope consists of an eyepiece lens of focal length 6.0 cm and an objective lens...
• 11N.3.SL.TZ0.16c: Lenses used in the compound microscope are subject to spherical aberration and chromatic...
• 11N.3.SL.TZ0.14d: Digital information that is transmitted along optic fibres is often subject to dispersion due to...
• 11N.3.SL.TZ0.16a: A convex lens used as a magnifying glass has a focal length of fe. Derive an expression for the...
• 11N.3.SL.TZ0.16b: The convex lens in (a) is used as the eyepiece of a compound microscope. An object is placed...
• 12N.3.SL.TZ0.19b: Suggest why, in transmitting information in an optic fibre, infrared electromagnetic radiation...
• 12M.3.SL.TZ2.18b: The diameter of the Moon subtends an angle of 8.7×10–3 rad at the unaided eye. (i) Determine the...
• 12M.3.HL.TZ2.5b: The input power to a single optic fibre X is 25 mW. The signal needs to be amplified when the...
• 12N.3.SL.TZ0.21b: A converging lens is used as a magnifying glass. On the diagram draw rays to construct the image...
• 12M.3.SL.TZ2.18a: On the diagram above, (i) label with the letter F the two focal points of the eyepiece...
• 13N.3.SL.TZ0.15a: Construct rays on the diagram to show how the final image is formed.
• 13N.3.SL.TZ0.15c: Outline how the effects of chromatic aberration in the microscope eyepiece can be reduced by...
• 13N.3.SL.TZ0.15b: The intermediate image forms 14.8 cm from the objective lens. The distance between the lenses is...
• 11M.3.SL.TZ1.20a: (i) Define the term focal point. (ii) On the diagram above, construct the paths of two rays in...