The eye defect 'astigmatism' is corrected using MCQ with Answer and Explanation
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Question #1
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In the photoelectric effect, increasing the intensity of the incident light (while keeping frequency constant) will cause:
Correct Answer: Option B
Explanation:
According to Einstein's photoelectric equation, the kinetic energy of emitted electrons depends exclusively on the frequency of the incident light and the metal's work function. Intensity represents the number of photons striking the surface per second. More photons mean more collisions with electrons, leading strictly to an increase in the number of emitted photoelectrons (photoelectric current), not their energy.
According to Einstein's photoelectric equation, the kinetic energy of emitted electrons depends exclusively on the frequency of the incident light and the metal's work function. Intensity represents the number of photons striking the surface per second. More photons mean more collisions with electrons, leading strictly to an increase in the number of emitted photoelectrons (photoelectric current), not their energy.
Question #2
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A car moving with speed 54 km/h is stopped in 5 s. The distance covered before stop is
Question #3
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Radioactivity was first discovered by
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