Question

Q18. Minimum number of photons of light of wavelength 4000 A which provide energy
is
* 10"
(b) 2 10
(c) 2 x 10
(d) 210​

Answer 1

Explanation:

The photons of light having a wavelength 4000Å are necessary to provide 1.00J of energy are.

Answer 2

the number of photons with a wavelength of 4000 pm and energy of 1 J are 2.012 * 10^16.