Embibe Experts Solutions for Chapter: Dual Nature of Radiation and Matter, Exercise 1: Gujarat Board-2018

If the momentum of an electron is required to be the same as that of the wave having $5200 \mathrm{A}°$ wavelength, its velocity should be:____${\mathrm{ms}}^{-1}$.$\left(\mathrm{h}=6.63\times {10}^{-34}\mathrm{Js}, {\mathrm{m}}_{\mathrm{e}}=9.11\times {10}^{-31}\mathrm{kg}\right)$

To increase de Broglie wavelength of an electron from $0.5\times {10}^{-10}\mathrm{m} \mathrm{to} {10}^{-10}\mathrm{m}$ , its energy should be _____.

The wavelength of light incident on a photosensitive surface is reduced from$3500°\mathrm{A}$to $290 \mathrm{nm}$. Find change in stopping potential.

($\mathrm{h}= 6.625\times {10}^{-34}\mathrm{Js}$.)

A hydrogen atom absorbs $12.1 \mathrm{eV}$ of energy and gets excited to a higher energy level. How many photons are emitted during the downward transition? Assume during each downward transition, one photon is emitted.

The uncertainty in the position of a particle is the same as its de Broglie wavelength, uncertainty in its momentum is 

Which of the following physical quantity has the dimension of planck constant$\left(h\right)$?

If the photoelectric effect is not seen with the ultraviolet radiations in a given metal, photo electrons may be emitted with the _____.

Calculate the energy of photon in $\mathrm{eV}$ for a radiation of wavelength $5000 \stackrel{\circ }{\mathrm{A}}$. $(h=6.625\times {10}^{-34} \mathrm{J} \mathrm{s}, \mathrm{c}=3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}, \mathrm{e}=1.6\times {10}^{-19} \mathrm{C})$