Physics · 2015
JEE Main · 10 April 2015, Shift 1 · Q25
A parallel beam of electrons travelling in x -direction falls on a slit of width d (see figure). If after passing the slit, an electron acquires…
A parallel beam of electrons travelling in $\displaystyle x$-direction falls on a slit of width d (see figure). If after passing the slit, an electron acquires momentum $\displaystyle \mathrm{p}_y$ in the $\displaystyle y$-direction then for a majority of electrons passing through the slit (h is Planck's constant) :
Official answer
(3)
$\displaystyle \left|\mathrm{p}_y\right| \mathrm{d}<\mathrm{h}$
More from Dual Nature of Matter and Radiation
- The electric field at a point associated with a light wave is given by E=200[ sin (6 × 10^15) t+ sin (9 × 10^15) t] Vm^-1 Given: h=4.14 × 10^-15 eVs…2022
- In photoelectric effect, the stopping potential (V_0) v / s frequency (ν) curve is plotted. ( h is the Planck's constant and φ_0 is work function of…2025
- The work functions of Aluminium and Gold are 4.1 eV and and 5.1 eV respectively. The ratio of the slope of the stopping potential versus frequency…2023
- An electron is released from rest near an infinite non-conducting sheet of uniform charge density ' -σ '.The rate of change of de-Broglie wave length…2025
- An electron beam is accelerated by a potential difference V to hit a metallic target to produce X-rays. It produces continuous as well as…2017
- In a photoelectric experiment, the wavelength of the light incident on a metal is changed from 300 nm to 400 nm. The decrease in the stopping…2019
- Two particles move at right angle to each other. Their de Broglie wavelengths are λ_1 and λ_2 respectively. The particles suffer perfectly inelastic…2019
- Surface of certain metal is first illuminated with light of wavelength λ_1=350 nm and then, by light of wavelength λ_2=540 nm. It is found that the…2019
JEE Main 2015 Physics question, with the answer from NTA’s final answer key. Where our answers come from.