Einstein's Photoelectric Equation(Particle Nature of Light) NEET Questions

Physics - Dual Nature of Matter and Radiation

Einstein's Photoelectric Equation(Particle Nature of Light) MCQ Questions


1.
Einstein proposed his quantum theory of the photoelectric effect in:
A.
1916
B.
1921
C.
1887
D.
1905
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ANSWER :
D. 1905
2.
According to Einstein, electromagnetic radiation is composed of:
A.
Discrete units called quanta (photons), each of energy hν
B.
Streams of magnetic monopoles
C.
Negatively charged particles
D.
Continuous waves with continuously distributed energy
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ANSWER :
A. Discrete units called quanta (photons), each of energy hν
3.
In Einstein's photon theory, each quantum of radiant energy has energy:
A.
E = hν (where h is Planck's constant and ν is frequency)
B.
E = hc (where c is speed of light)
C.
E = h/ν
D.
E = hν²
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ANSWER :
A. E = hν (where h is Planck's constant and ν is frequency)
4.
The fundamental basis of Einstein's photoelectric equation is:
A.
Heisenberg's uncertainty principle
B.
Maxwell's wave equations
C.
Energy conservation in absorption of one photon by one electron
D.
Momentum conservation between two photons
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ANSWER :
C. Energy conservation in absorption of one photon by one electron
5.
Einstein's photoelectric equation is written as:
A.
Kₘₐₓ = φ₀ − hν
B.
Kₘₐₓ = (hν)(φ₀)
C.
Kₘₐₓ = hν + φ₀
D.
Kₘₐₓ = hν − φ₀
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ANSWER :
D. Kₘₐₓ = hν − φ₀
6.
In Einstein's photoelectric equation Kₘₐₓ = hν − φ₀, the term φ₀ represents:
A.
Total energy of the photon
B.
Maximum kinetic energy of the photoelectron
C.
Work function — minimum energy needed to escape the metal surface
D.
Frequency of incident light
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ANSWER :
C. Work function — minimum energy needed to escape the metal surface