Answer:
19.89×10^-26Jm
Explanation:
The Energy of a photon is given as;
E = h×c/λ
Where h is Plank's constant.
c is speed of light
λ is the wavelength.
By multiplying both sides of the equation to λ
E × λ = h×c/λ × λ
E × λ = h×c
= 6.63×10^-34× 3×10^8
= 19.89×10^-26Jm
