Question

which color of light has the highest energy?
blue
red
green
violet

Explanation:

The energy of a photon of light is given by the formula \( E = h
u \) (where \( h \) is Planck's constant and \(
u \) is the frequency) or \( E=\frac{hc}{\lambda} \) (where \( \lambda \) is the wavelength). Light with shorter wavelength has higher frequency and thus higher energy. In the visible spectrum, violet light has the shortest wavelength among blue, red, green, and violet. So violet light has the highest energy.

Answer:

D. violet (assuming the options are labeled as A. blue, B. red, C. green, D. violet)