A particle moving with kinetic energy E has de Broglie wavelength λ . If energy Δ E is added to its energy, the wavelength become λ 2 . Value of Δ E , is:

Question

A particle moving with kinetic energy E has de Broglie wavelength λ . If energy Δ E is added to its energy, the wavelength become λ 2 . Value of Δ E , is:, E, 4 E, 3 E, 2 E

MARKS App · Accepted Answer

λ = h 2 K E m ⇒ λ ∝ 1 K E λ λ 2 = K E f K E i 4 K E i = K E f ⇒ Δ E = 4 K E i - K E i = 3 K E = 3 E

Search any question & find its solution

Looking for more such questions to practice?