Wave Optics - SS1 Physics Past Questions and Answers (page 4)

31

Which of the following statements is true about the single-slit diffraction pattern?

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A

The bright fringes become wider as the slit width increases

B

The dark fringes become narrower as the wavelength of light increases.

C

The spacing between the fringes becomes narrower as the slit width decreases.

D

The intensity of the fringes remains constant regardless of the slit width.

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32

What happens to the single-slit diffraction pattern when the wavelength of light is decreased?

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A

The bright fringes become wider.

B

The dark fringes become wider.

C

The bright fringes become narrower.

D

The dark fringes become narrower.

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33

Explain the phenomenon of single-slit diffraction.

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34

Describe the factors that affect the extent of single-slit diffraction.

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35

What is polarisation of light?

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A

The bending of light waves as they pass through a medium.

B

The separation of white light into its component colours.

C

The alignment of light waves along a specific orientation.

D

The reflection of light waves off a smooth surface.

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36

What type of light waves can be polarised?

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A

Longitudinal waves

B

Transverse waves

C

Electromagnetic waves

D

Mechanical waves.

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37

Which type of polarisation occurs when light waves vibrate in a single plane?

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A

Unpolarised light

B

Linear polarisation

C

Circular polarisation

D

Transverse polarisation.

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38

What optical device can be used to produce polarised light?

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A

Convex lens

B

Concave lens

C

Prism.

D

Polarising filter.

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39

How does a polarising filter work?

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A

It absorbs all light waves except those vibrating in a specific direction

B

It refracts light waves to separate them based on their wavelength

C

It reflects light waves off a metallic surface

D

It scatters light waves in multiple directions.

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40

Which statement about polarisation is true?

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A

All light waves are naturally polarised

B

Polarisation can only occur in a vacuum

C

The direction of polarisation is always vertical

D

The angle of polarisation depends on the medium through which the light passes.

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Wave Optics - SS1 Physics Past Questions and Answers - page 4