Q. What is the effect of increasing the intensity of light on the photoelectric effect?
A.
It increases the energy of emitted electrons
B.
It increases the number of emitted electrons
C.
It decreases the threshold frequency
D.
It has no effect on the photoelectric effect
Solution
Increasing the intensity of light increases the number of photons hitting the surface, which in turn increases the number of emitted electrons, provided the frequency is above the threshold.
Correct Answer:
B
— It increases the number of emitted electrons
Q. What is the photoelectric effect primarily evidence for?
A.
The wave nature of light
B.
The particle nature of light
C.
The dual nature of light
D.
The electromagnetic spectrum
Solution
The photoelectric effect provides evidence for the particle nature of light, as it demonstrates that light can be thought of as consisting of discrete packets of energy called photons.
Q. What is the photoelectric effect primarily evidence of?
A.
Wave nature of light
B.
Particle nature of light
C.
Thermal energy transfer
D.
Chemical reactions
Solution
The photoelectric effect is primarily evidence of the particle nature of light, as it demonstrates that light can be thought of as consisting of discrete packets of energy called photons.
Q. Which equation describes the photoelectric effect?
A.
E = mc^2
B.
E = hf - φ
C.
E = 1/2 mv^2
D.
E = kx
Solution
The equation E = hf - φ describes the photoelectric effect, where E is the kinetic energy of the emitted electron, hf is the energy of the incident photon, and φ is the work function.
