Question

wavelenght of photon having energy 124ev​

Answer 1

Given:

• Energy (E) = 124 ev = 124×1.602×10^19 J

= 198.64× 10^-19 J.

To find:

• The wavelength of photon.

Solution:

We know that,

$\sf\bf{E = \frac{hc}{ \lambda} }$

$\sf\bf{ \lambda = \frac{hc}{E} }$

$\sf \rightsquigarrow \:{ \lambda = \frac{6.626 \times {10}^{ - 34} \times 2.99792458 \times {10}^{8} }{198.64 \times {10}^{ - 19} } }$

$\sf\rightsquigarrow \: {\lambda≈10 \times {10}^{ - 9}m }$

Therefore, the wavelength of photon is 10nm

Answer 2

Answer:

❥Answer࿐

Attached this picture