Reference no: EM132438745

Which of the following is not true regarding the photoelectric effect?

• The number of photoelectrons is related to the frequency of the incoming light.
• The photoelectrons are ejected nearly instantaneously when the light hits the surface of the photosensitive material.
• There is a minimum frequency of light required for the photoelectric effect to occur.
• The number of photoelectrons is related to the intensity of the incoming light.

Which single experiment shows that light behaves both as a wave and a particle?

• Lenard's experiments on the photoelectric effect
• Young's double-slit experiment with single photons
• Young's double-slit experiment with a steady beam of light
• Roentgen's experiments with X rays

What is the energy of a photon of red light (λ=730 nm)in joules? (h = 6.63 × 10^-34 J · s )

• 6.00 × 10^-19 J
• 2.70 × 10^-19 J
• 8.97 × 10^-18 J
• 3.94 × 10^-19 J

The minimum frequency for the photoelectric effect of a zinc plate is 9.7 × 10^14 Hz. What will be the kinetic energy of an ejected electron when a photon with a wavelength 200 nm (2.00 × 10^-7 m) strikes it?

• 3.51×10-19 J
• 9.94×10-19 J
• 2.00×10-19 J
• 7.00×10-19 J

One twin sets off on a long space voyage traveling at 0.9 c, while the other stays on Earth. When she returns 60 years later, the traveling sister has hardly aged at all, while her twin has aged 60 years. What aspect of relativity is demonstrated in this situation?

• mass-energy equivalence
• time dilation
• length contraction
• mass increase

Which postulate of relativity was supported by the experiments of Michelson and Morley?

• no absolute frame of reference
• principle of relativity
• principle of equivalence
• constancy of the speed of light

Which consequence of special relativity is most associated with nuclear power?

• length contraction
• mass-energy equivalence
• time dilation
• mass increase