Question

photon having wavelength 200 pm has ____ energy as photon having 2000A°​

Answer 1

I hope it helps you my friend

Answer 2

To find:

Which photon has higher energy?

Calculation:

According to Planck's Equation :

$\boxed{ \bold{E = \dfrac{hc}{ \lambda} }}$

• E is energy, 'h' is Planck's Constant, $\lambda$ is wavelength and 'c' is Velocity of light.

So, for constant 'c' , we can say:

$\boxed{ \bold { \implies E \propto \dfrac{1}{ \lambda} }}$

• So, higher the wavelength, lower will be energy content .

Now, convert the wavelength data in single unit:

$\rm \: 1)200 \: pm = \dfrac{200}{100} \times {10}^{ - 10} = 2 \: {A}^{ \circ}$

$\rm \: 2)2000 \: {A}^{ \circ}$

So, 2nd wave has higher wavelength, hence has lesser energy !

Photon having wavelength 200 pm has HIGHER energy as photon having 2000A°