एक फोटॉन , जिसकी ऊर्जा 66.3 eV है, उसकी तरंगदैर्घ्य क्या होगी ?
(`h=6.6xx10^(-34)` जूल-सेकण्ड, `c=3.0xx10^(8)` मीटर/सेकण्ड )।

What is the wavelength of light . Given energy =3.03xx10^(-19)J, h=6.6xx10^(-34)JS, c=3.0xx10^(8)m//s ?

When light of wavelength 248 nm falls on a metal of threshold energy 3.0 eV, the de-Broglie wavelength of emitted electrons is "_________"Å (Round off to the Nearest Integer). [Use : sqrt3 = 1.73 , h - 6.63 xx 10 ^(-34) Js m _(c ) = 9.1 xx 10 ^(-31) kg , c =3.0 xx 10 ^(8) ms ^(-1) ,1eV = 1. 6 xx 10 ^(-19))]

Which of the metal sodium and copper will be suitable for photelectric cell using light of wavelength 4000 Å . The work functions of sodium and copper are respectively 2.0 eV and 4.0 eV. Take h=6.6 xx 10^(-34) Js, c = 3.0 xx 10^(8) ms^(-1) and 1 eV = 1.6 xx 10^(-19) J

What is the frequency of a photon whose energy 66.3 eV ? Given : h = 6.63 xx 10^(-34) Js

If a light of wavelength 4950 Å is viewed as a continuous flow of photons, what is the energy of each photon in eV ? (Given h = 6.6 xx 10^(-34) "Js, c =" 3 xx 10^(8) ms^(-1) )