Embibe Experts Solutions for Chapter: Dual Nature of Matter and Radiation, Exercise 1: AMU-AT (B.Tech.) 2017

When a beam of $10.6\mathrm{eV}$ photons of intensity $2.0 \mathrm{W} {\mathrm{m}}^{-2}$ falls on a metallic surface of area $1\times {10}^{-4} {\mathrm{m}}^2, 0.53\%$ of the incident photons eject photoelectrons. What is the number of photoelectrons emitted per second?

The wave nature of electron was first experimentally verified by

The wavelength of $1 \mathrm{keV}$ photon is $1.24\times {10}^{-9} \mathrm{m}.$ What is the frequency of $1 \mathrm{MeV}$ photon?

The de-Broglie wavelength of a tennis ball mass $60 \mathrm{g}$ moving with a velocity of $10 \mathrm{m} {\mathrm{s}}^{-1}$ is ___. Given: Planck's constant $=6.63\times {10}^{-34} \mathrm{J} \mathrm{s}$ 

What will be the ratio of de-Broglie wavelengths of proton and $\alpha$-particle of the same energy?