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In a photoelectric experiment, with ligh...

In a photoelectric experiment, with light of wavelength `lambda`, the fastest election has speed v. If the exciting wavelength is changed to `(3lambda)/4`, the speed of the fastest emitted electron will become

A

`vsqrt(3/4)`

B

`vsqrt(4/3)`

C

less than `vsqrt(3/4)`

D

greater than `vsqrt(4/3)`

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PHYSICS GALAXY - ASHISH ARORA-PHOTOELECTRIC EFFECT AND MATTER WAVES-Numerical MCQs
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  2. When a metallic surface is illuminated with monochromatic light of wav...

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  3. In a photoelectric experiment, with light of wavelength lambda, the fa...

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  4. The work function of a certain metal is (hC)/lambda(0). When a monochr...

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  5. Radiation of frequency 1.5 times the threshold frequency is incident o...

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  7. When a certain metallic surface is illuminated with mono chromatic lig...

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  8. In the photoelectric experiment, if we use a monochromatic light, the ...

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  9. The eye can detect 5xx10^(4) photons (m^2s)^(-1) of green light (lamda...

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  10. A metal whose work function is 3.3eV is illuminated by light of wavele...

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  11. In Q 28, the maximum energy of photoelectrons is:

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  12. In Q.28, what is the stopping potential?

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  13. A point source of radiation power P is placed on the x-axis of an idea...

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  14. A sensor is exposed for time t to a lamp of power P placed at a distan...

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  15. The de-Broglie wavelength of an electron moving with a velocity 1.5 xx...

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  16. Monochromatic light of frequency v(1) irradiates a photocell and the s...

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  17. An electromagnetic radiation of frequency 3 xx 10^(15) cycles per seco...

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  18. Two identical photocathode receive light of frequencies f(1) and f(2)....

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