Question

exam lesson name: light and sound
exam number: 700699rr
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question 16 of 20 :
select the best answer for the question.

1. which of the following helps support the argument that light behaves like a particle?

○ a. diffraction is observed with light.
○ b. sound, which travels in waves, cant travel through a vacuum.
○ c. interference is observed with light.
○ d. unlike sound, light waves dont need a medium to self-propagate.

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Explanation:

• Option A: Diffraction is a wave - like property. So this option supports light as a wave, not a particle.
• Option B: This is about sound's inability to travel in a vacuum and has no direct relation to light's particle - like behavior.
• Option C: Interference is also a wave - like property, so it supports light as a wave.
• Option D: Sound waves (mechanical waves) need a medium, but light (which can be considered as particles - photons) can travel in a vacuum. This shows a particle - like characteristic of light as photons don't need a medium to propagate.

Answer:

D. Unlike sound, light waves don't need a medium to self - propagate.