Question

find the wave length of a wave whose frequency is 25.10^15 sec^-1​

Answer 1

Answer:-

$\bull\sf Frequency=v=25\times 10^{15}s^{-1}$

$\bull\sf Wavelength=\lambda=?$

We know

$\boxed{\sf \lambda=\dfrac{C}{V}}$

• C=Speed of light in vaccum

$\\ \sf\longmapsto \lambda=\dfrac{3\times 10^8ms^{-1}}{25\times 10^{15}s^{-1}}$

$\\ \sf\longmapsto \lambda=0.12\times 10^{-7}m$

$\\ \sf\longmapsto \lambda=1.2\times 10^{-6}m$

$\\ \sf\longmapsto \lambda=1.2\mu m$