Which diagram best represents the light waves of a bright red brake light on the left side to a dim violet night light on the right side?
a)
b)
c)
d)

Diagram-A does.

The left side has high amplitude (bright) and long wavelength (red).

The right side has low amplitude (dim) and short wavelength (violet).

the part of the wave he is travelling on is the crest

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j