Target Exam

CUET

Subject

Physics

Chapter

Dual Nature of Radiation and Matter

Question:

Options:

a

b

c

d

Correct Answer:

a

Explanation:

$\text{Debroglie Wavelength } \lambda = \frac{h}{p} = \frac{h}{\sqrt {2mE}}$

$\lambda' = \frac{\lambda}{2} =  \frac{h}{\sqrt {2m(E+\Delta E)}}$

$\frac{1}{2}\frac{h}{\sqrt {2mE}} = \frac{h}{\sqrt {2m(E+\Delta E)}}$

$\Rightarrow (E+\Delta E) = 4E $

$\Rightarrow \Delta E = 3E$