Question

Pls guys help

Calculate the Frequency and wavelength of photon with energy 3.98×10^-15J​

Answer 1

Answer:-

• Energy of Photon=E=$\rm 3.98×10^{-15}J$

• Frequency=v=?

According to planks Quantum theory

$\boxed{\sf E=hv}$

$\\ \rm\longmapsto v=\dfrac{E}{h}$

$\\ \rm\longmapsto v=\dfrac{3.98\times 10^{-15}J}{6.626\times 10^{-34}Js}$

$\\ \rm\longmapsto v=6.0\times 10^18s^{-1}$

$\\ \bf\longmapsto Frequency=6\times 10^18Hz$

Now

• Wavelength=$\lambda$=?

We know that

$\boxed{\sf \lambda=\dfrac{c}{v}}$

$\\ \rm\longmapsto \lambda=\dfrac{3\times 10^8ms^{-1}}{6\times 10^{18}s^{-1}}$

$\\ \rm\longmapsto \lambda=0.5\times 10^{-10}m$

$\\ \bf\longmapsto Wavelength=0.5Å$