Cool white light adjustable solar street light solar knowledge:

In the photoelectric conversion, it is also necessary to observe the law of conservation of momentum. What is the law of conservation of momentum?

Let us look at a mechanics problem as follows

"The ball 1 of mass m moves at a constant speed along the x direction on a smooth surface. When this

How will the speed v of the ball 1 and the speed v2 of the ball 2 be after the ball collides with the stationary ball 2 whose mass is also m?

The change is from the law of conservation of energy. I2m2=l2m(v+v2)

From the law of momentum (the product of mass and velocity), m=m+my

According to the above equation, Vい=0. That is, the ball 1 will be stationary, and the ball 2 will move at a uniform speed at the speed of the original ball 1. Like this, it is very important to consider the law of conservation of momentum when considering the magnetic collision problem. The electrons of the valence band will partially follow the law of conservation of momentum when they are transitioned to the conduction band by the light.