Question

ans the question as fast as u can.​

Answer 1

Explanation:

E=nhυ=nhc/λ

1J=n X 6.626 X 10-³⁴ X 3 X 10^8

4000 X 10-¹²

n= 4000 X 10-¹².

6.626 X 10-³⁴ X 3 X 10^8

n≈201.227 x 10¹⁴ photons