Question 1

Marks: 1

Light incident on a single slit creates a diffraction pattern on a screen a certain distance away.

What is the definition of a single slit diffraction pattern?

A single slit diffraction pattern is represented as dark fringes of light on the screen separated by coloured strips that show areas of constructive and destructive interference.
A single slit diffraction pattern is represented as a single white band of light in the centre of the screen with black surrounding it.
A single slit diffraction pattern is represented as a series of light and dark fringes which show the areas of maximum and minimum intensity.
A single slit diffraction pattern is represented as a series of wide and narrow strips of light which show the areas of constructive and destructive interference.

Question 2

Marks: 1

When white light is diffracted through a single slit which colour appears closest to the central maximum when viewed on a screen?

Violet
Blue
Red
Green

Question 3

Marks: 1

Light of different wavelengths is incident on a single slit. A diffraction pattern is created on a screen a distance away.

What is the relationship between the wavelength of the light and the width of the bright fringe on the diffraction pattern?

Blue light produces a diffraction pattern with the widest fringes
Red light produces a diffraction pattern with the widest fringes
All wavelengths of light produce bright fringes of equal width
Changing the width of the slit is the only variable that affects the width of the bright fringes

Question 4

Marks: 1

Monochromatic light is incident on a narrow slit and a diffraction pattern of bright and dark fringes is observed on a screen some distance away.

How does making the single slit narrower affect the spacing of the bright fringes on the screen?

The fringe spacing increases with diffraction angle away from the central maximum
The fringe spacing is narrower
The fringe spacing is wider
It has no effect

Question 5

Marks: 1

What is the equation for the angle of diffraction of the first minima for light diffracted through a single slit that creates a diffraction pattern onto a screen?

$θ = \frac{λ}{b}$
$n λ = d \sin θ$
$s = \frac{λ D}{d}$
$θ = \frac{s}{d}$

Question 6

Marks: 1

Light of the same wavelength is incident on a single slit. The width of the slit is changed. A diffraction pattern for each slit width is observed on a screen some distance away.

Which diffraction pattern represents that of the narrowest slit?

9-2-ib-hl-emcq6-q

Question 7

Marks: 1

Monochromatic light of different wavelengths is incident on a single slit. A diffraction pattern is observed on a screen some distance away.

Which diffraction pattern represents the longest wavelength of light?

9-2-ib-hl-emcq7-q

Question 8

Marks: 1

Monochromatic light is incident on a single slit and the interference pattern is observed on a screen some distance away.

What is the expression for the path difference between two rays that interfere destructively at a point P on the screen?

$\frac{n λ}{2}$
$n λ$
$d \sin θ$
$\frac{λ D}{d}$

Question 9

Marks: 1

Monochromatic light is incident on a single slit with a diffraction pattern created on a screen some distance away.

What small angle approximation is used in obtaining the equation $θ = \frac{λ}{b}$ to calculate the angle of diffraction of the first minimum of the single slit diffraction pattern?

tanθ ≈ sinθ
sinθ ≈ θ
tanθ ≈ θ
cosθ ≈ θ

Question 10

Marks: 1

Monochromatic light is incident on a single slit and a diffraction pattern is observed on a screen some distance away.

How does the diffraction pattern change when the single slit and the screen are moved further apart?

Fringe intensity is decreased
Fringe intensity is increased
Fringe width is decreased
Fringe width is increased

DP IB Physics: HL

Topic Questions

9.2 Single-Slit Diffraction

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

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