A visible light has a wavelength of 727.3 nm. Determine its frequency, energy per photon, and color.

and

Explanation:

The wavelength of a visible light is 727.3 nm.

The formula is as follows :

f is the frequency of the visible light

Energy of a photon is given by :

E = hf, h is Planck's constant

Red color has a frequency of and energy per photon is .

i think the answer is a, hope this : )

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray