The wave of wavelength `5900 Å` emitted by any atom or molecule must have some finite total length which known as coherence length. For sodium light, this length is `2.4cm`. The number of oscillation in this length will be,

Options

A. `4.068xx10^(8)`
B. `4.068xx10^(4)`
C. `4.068xx10^(6)`
D. `4.068xx10^(5)`

Answer

b

Explanation

No. of oscillation in coherence length area
`=(l)/(lambda)=(0.024)/(5900xx10^(-10))`