Question

How do you calculate the energy of light that has a wavelength of 10 cm?

Answer 1

E = 1.992 x `10^-24` Joules

Explanation:

E = `(h*c)/ lambda`

h is the Plank's Constant
E is the Energy
c is the Speed of light

h = 6.64 x `10^-34` `m^2` kg /sec
c = 300000 km/ sec
`lambda` = 10 cm = 10/100 = 0.1 m

E = (6.64 x `10^-34` x 300000000)/ 0.1

E = 1.992 x `10^-24` Joules