Chapter%2029%20A

1
Chapter 29 A

• Light Waves
• Single slit diffraction
• and
• double slit interferance

2
According to Huygens principle, every point on a
wave

1. is a diffraction source.
2. is the superposition of every other wave.
3. is perpendicular to the rays of the waves.
4. behaves as a source of new waves.

3
According to Huygens principle, every point on a
wave

1. is a diffraction source.
2. is the superposition of every other wave.
3. is perpendicular to the rays of the waves.
4. behaves as a source of new waves.

4
Diffraction is more pronounced for waves passing

1. through small openings.
2. through large openings.
3. from one medium to another.
4. from shadow regions.

5
Diffraction is more pronounced for waves passing

1. through small openings.
2. through large openings.
3. from one medium to another.
4. from shadow regions.

6
Diffraction can occur for

1. sound.
2. ultrasound.
3. light.
4. waves of all kinds.

7
Diffraction can occur for

1. sound.
2. ultrasound.
3. light.
4. waves of all kinds.

8
For viewing tiny objects in an optical
microscope, diffraction is

1. helpful.
2. a hindrance.
3. Sometimes either of these.
4. not a factor.

9
For viewing tiny objects in an optical
microscope, diffraction is

1. helpful.
2. a hindrance.
3. Sometimes either of these.
4. not a factor.

10
A diffraction grating relies on light

1. interference.
2. variations in amplitude.
3. variations in brightness.
4. being composed of photons.

11
A diffraction grating relies on light

1. interference.
2. variations in amplitude.
3. variations in brightness.
4. being composed of photons.

12
When light undergoes interference, it can
sometimes

1. increase in amplitude.
2. cancel completely.
3. Both of these.
4. None of these.

13
When light undergoes interference, it can
sometimes

1. increase in amplitude.
2. cancel completely.
3. Both of these.
4. None of these.

Explanation Light can build in amplitude by
constructive interference and can cancel by
destructive interference.
14
When light undergoes interference, the quantity
most affected is its

1. frequency.
2. amplitude.
3. wave nature.
4. phase.

15
When light undergoes interference, the quantity
most affected is its

1. frequency.
2. amplitude.
3. wave nature.
4. phase.

16
Interference can be exhibited by

1. sound waves.
2. light waves.
3. standing waves.
4. all waves.

17
Interference can be exhibited by

1. sound waves.
2. light waves.
3. standing waves.
4. all waves.