JEE Advanced · Modern Physics · Quiz
5 real JEE Advanced questions on Modern Physics. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.
Question 1 of 3
HARDA helium atom absorbs a photon of wavelength 310 nm. Assuming momentum is conserved during photon absorption, the change in velocity (in cm/s) of the helium atom is approximately: (Use: h = 6.6 × 10⁻³⁴ J·s, Avogadro number = 6 × 10²³ mol⁻¹, molar mass of He = 4 g/mol)