2. A photon is a particle that _____ A) is usually only observed in nuclear reac

Question

2. A photon is a particle that _____

A) is usually only observed in nuclear reactions

B) has a velocity in vacuum that depends on the photon frequency

C) cannot travel in vacuum

D) has zero electric charge

3. If the wavelength of a photon is halved, by what factor does its energy change?

A) 1/4

B) 2

C) It does not change

D) 4

E) 1/2

4. In order for a photon to eject photoelectrons from a surface in the photoelectric effect, the photon’s ____

A) energy must be below the work function of the surface

B) wavelength must be above a certain minimum value

C) frequency must be above a certain minimum value

D) speed must be greater than a certain minimum value

Explanation / Answer

2.   D) has zero electric charge

3. B) 2

4. C) frequency must be above a certain minimum value

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