Question

Calculate the number of photons of light of wavelength 3960a necessary to provide 1j energy.

Answer 1

Given:

The wavelength is 3960 A

The energy is 1 J

To find;

The number of photons of light in the wavelength

Solution:

The formula for the number of photons be

N= E×λ/h×c

Putting the above values

N=1J×3960×10⁻¹⁰/(6.26×10⁻³⁴)×3×10⁸

N=210.86×10¹⁶

Therefore the number of photons be 210 ×10¹⁶

Answer 2

Answer:

your answer is 2×10^16. ok.