A monochromatic beam of laser light falls on a thin slit submerged in water and

Question

A monochromatic beam of laser light falls on a thin slit submerged in water and produces a series of bright and dark spots on a screen. If this apparatus (slit and screen) is in air, the distance between the dark spots Proton A has a de Broglie wavelength lambda. If proton B has three times the speed (which is much less than the speed of light) of proton A, the de Broglie wavelength of proton B is Light of frequency f falls on a metal surface and ejects electrons of maximum kinetic energy K (K > 0) by the photoelectric effect. If the frequency of this light is doubled, the maximum kinetic energy of the emitted electrons will be

Explanation / Answer

Q5.  since light=energy which is k. 2k. the double you're answer would be d

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