Question

1. The energy of a photon is related to A. the energy level difference through which...

1. The energy of a photon is related to

A. the energy level difference through which it falls.

B. the energy given to the atom that emits it.

C. its frequency.

D. all of these.

2. Rays of light are always refracted in a(an)

A

indefinite direction.

B

definite direction.

C

acute angle.

D

obtuse angle.

3. A change in the speed of light is known as

A

reflection.

B

critical change.

C

refraction.

D

rarefaction.

4. The refractive index of a medium is

A

speed of light in air to speed of light in vacuum.

B

speed of light in vacuum to speed of light in air.

C

focal length to object distance.

D

speed of light in the medium x speed of light in the air.
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