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Diffraction of light - Single slit

Authored by Susan Thomas

Physics

10th - 11th Grade

NGSS covered

Used 145+ times

Diffraction of light - Single slit
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12 questions

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1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

A slit of width a is used to observe a diffraction pattern on a screen at a distance L from the slit.If the width of the slit were doubled, the width of the central bright band would

decrease by a factor of 4

decrease by a factor of 2

increase by a factor of 2

increase by a factor of 4

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Light of wave length 3.5x102 nm is incident on a slit of width 0.5mm . Which of the following expressions corresponds to the angle at which the second order minimum is formed

sinθ= 2.2 x 10 -4

sinθ= 3.5 x 10 -4

sinθ= 1.1 x 10 -3

sinθ= 1.4 x 10 -3

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Light of wavelength 2. 5 x 10 2nm is incident on a slit of width 0.3 mm. What order of dark band corresponds to

sinθ = 2. 5 x 10 -3

4

3

2

1

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The table lists the range of wavelengths in vacuum corresponding to a given color.Which one of the colors will produce a diffraction pattern with the widest central maximum, assuming all other factors are equal?

Red ( 780-622 nm)

Yellow ( 597-577 nm)

Green ( 577-492 nm)

Blue ( 492-455 nm)

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Diffraction occurs when light passes through a single slit. Rank the following three choices in decreasing order, according to the extend of the diffraction that occurs(largest diffraction first )

  1. Blue light , narrow slit
  2. Red light , narrow slit
  3. Blue light , wide slit

1,2,3

2,1,3

3,1,2

1,3,2

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

In a single slit diffraction experiment the width of the slit is reduced . What happens to the width of the central bright fringe in the resulting diffraction pattern

Stays the same

It becomes narrower

it becomes wider

the central bright fringe disappears

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

A single slit diffraction pattern is formed on a distant screen. Assuming the angles involved are small, by what factor will the width of the central bright spot on the screen change if the wavelength of the illuminating light is doubled?

It will be cut to one -quarter its original size

It will be cut in half

It will double

It will become four times as large

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