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Photoelectric emision occurs only when the incident light has more than a certain minimum
Options
(a) power
(b) wavelength
(c) intensity
(d) frequency
Correct Answer:
frequency
Explanation:
For occurence of photoelectric effect, the incident light should have frequency more than a certain minimum which is called the threshold frequency (v₀).
We have, 1/2 mv² = hv – hv₀
for photoelecric effect emission v > v₀ where v is the frequency of the incident light.
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Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The time period of a simple pendulum in a lift descending with constant acceleration g is
- The total radiant energy per unit area, normal to the direction of incidence
- 24 cells of emf 1.5 V each having internal resistance of 1 ohm are connected
- An amplifier has a voltage gain Av=1000. The voltage gain in dB is
- An A.C source is rated at 220 V, 50 Hz. The time taken for voltage to change
Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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