WorksheetsPhoton and Photoelectric Effects
Total questions: 8
Worksheet time: 4mins
Which statement about a photon is correct?
A particle with high penetrating power
A particle that emits light
A discrete package of light energy
A positively charge particle that travels at high speed
What is the energy of a photon of red light of wavelength 700 nm?
2.8×10−19 J
4.6×10−19 J
2.0×10−25 J
1.6×10−32 J
Which of the following is the experimental evidence that light energy is in discrete quantity known as photon?
Visible light spectrum
Line spectrum of hydrogen gas
Production of X-rays
Diffraction of light by a diffraction grating
The energy of a photon of light is E. Which is the correct expression for its wavelength, λ?
λ=chE
λ=hcE
λ=Ehc
λ=hEc
Among the photons of red, blue and green light, which of the following is in the correct order of increasing energy?
Red, blue, green
Red, green, blue
Green, blue, red
Green, red, blue
Which graph correctly shows the relationship between the energy, E of a photon of light with the wavelength, λ?
Photoelectric effect is the emission of
light by fast electrons
electrons when light falls on a metal surface
light when electrons hit a metal surface
electrons when a metal is heated by an electric current
When a copper plate is illuminated by light, no photoelectrons are emitted. Which is the correct explanation?
The duration of the copper plate exposed to light is not sufficient
The work function of copper is lower than the energy of a light photon
The intensity of light is insufficient for the emission of photoelectrons
The frequency of light is lower than the threshold frequency of copper
