Answer:
Neither.
Explanation:
When an electron is released from rest, in an uniform electric field, it will accelerate moving in a direction opposite to the field (as the field has the direction that it would take a positive test charge, and the electron carries a negative charge).
It will move towards a point with a higher potential, so its kinetic energy will increase, while its potential energy will decrease:
⇒ ΔK + ΔU = 0 ⇒ ΔK = -ΔU = - (-e*ΔV)
As ΔV>0, we conclude that the electric potential energy decreases while the kinetic energy increases in the same proportion, in order to energy be conserved, in absence of non-conservative forces.
Answer:
Energy of UV light 
Energy of green light 
Energy of infrared light 
Explanation:
We have given the wavelength of UV light = 400 nm 
, wavelength of green light = 550 nm and wavelength of infrared = 900 nm
Speed of light 
Plank's constant 
Energy of the signal is given by 
So energy of UV light 
Energy of green light 
Energy of infrared light 
<h3><u>Answer;</u></h3>
<em>When a wave meets a boundary, the angle of the reflected wave is equal to the angle of the incident wave</em>
<h3><u>Explanation</u>;</h3>
- <em><u>Reflection is the property of waves in which the waves bounces back upon meeting or hitting the surface of an object or a boundary.</u></em> It may also refer to the change in the direction of a wave when it meets an interface between two media.
- Therefore, when a wave such as light waves meets an opaque surface, they will bounce back off the surface.
- <em><u>The reflection of waves obeys the Laws of reflection such that the angle of reflection is equal to the angle of incident wave.</u></em>
