1. Light Waves Single slit diffraction and double slit interferance
Chapter 29 A
Light Waves
Single slit diffraction
and
double slit interferance

2. According to Huygens’ principle, every point on a wave
is a diffraction source.
is the superposition of every other wave.
is perpendicular to the rays of the waves.
behaves as a source of new waves.
Answer: D

3. According to Huygens’ principle, every point on a wave
is a diffraction source.
is the superposition of every other wave.
is perpendicular to the rays of the waves.
behaves as a source of new waves.
Answer: D

4. Diffraction is more pronounced for waves passing
through small openings.
through large openings.
from one medium to another.
from shadow regions.
Answer: A

5. Diffraction is more pronounced for waves passing
through small openings.
through large openings.
from one medium to another.
from shadow regions.
Answer: A

6. Diffraction can occur for
sound.
ultrasound.
light.
waves of all kinds.
Answer: D

7. Diffraction can occur for
sound.
ultrasound.
light.
waves of all kinds.
Answer: D

8. For viewing tiny objects in an optical microscope, diffraction is
helpful.
a hindrance.
Sometimes either of these.
not a factor.
Answer: B

9. For viewing tiny objects in an optical microscope, diffraction is
helpful.
a hindrance.
Sometimes either of these.
not a factor.
Answer: B

10. A diffraction grating relies on light
interference.
variations in amplitude.
variations in brightness.
being composed of photons.
Answer: A

11. A diffraction grating relies on light
interference.
variations in amplitude.
variations in brightness.
being composed of photons.
Answer: A

12. When light undergoes interference, it can sometimes
increase in amplitude.
cancel completely.
Both of these.
None of these.
Answer: C

13. When light undergoes interference, it can sometimes
increase in amplitude.
cancel completely.
Both of these.
None of these.
Answer: C
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
frequency.
amplitude.
wave nature.
phase.
Answer: B

15. When light undergoes interference, the quantity most affected is its
frequency.
amplitude.
wave nature.
phase.
Answer: B

16. Interference can be exhibited by
sound waves.
light waves.
standing waves.
all waves.
Answer: D

17. Interference can be exhibited by
sound waves.
light waves.
standing waves.
all waves.
Answer: D