First slide

Matter waves (DC Broglie waves)

Question

The de-Broglie wavelength of the electron in the first excited state of hydrogen atom is

Moderate

A

3.3 $\overset{o}{A}$
B

5.2 $\overset{o}{A}$
C

4.6 $\overset{o}{A}$
D

6.6 $\overset{o}{A}$

Solution

The de Broglie wavelength of the electron in the nth excited state in hydrogen atom $λ =3.3 \overset{o}{A}$
Here n = 2, $∴ λ = 3.3 \times 2 \overset{o}{A} = 6.6 \overset{o}{A}$

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