Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Dual Nature of Radiation and Matter

Question:

The Kinetic Energy of an electron having de Broglie wavelength($\lambda$) triple , then the de Broglie wavelength associated with it becomes:

Options:

\(\frac{λ}{3}\)

\(λ\sqrt{3}\)

\(\frac{λ}{\sqrt{3}}\)

Correct Answer:

\(\frac{λ}{\sqrt{3}}\)

Explanation:

$\lambda = \frac{h}{\sqrt {2mE}}$

$\Rightarrow \lambda \propto \frac{1}{\sqrt E}$

$\lambda'= \frac{\lambda}{\sqrt 3}$