this week in science, i learnt that when the laser i pointed at a mirror, the same angle that it is shot at, in the same angle, the laser will leave the mirror.
as you see, the ray comes and hits the mirror at a at a 45 degree angle. Then when leaving the mirror, the light ray leaves at the exact same angle that it came and hit the mirror.
I was able to test this in class because in my experiment, we glued a protractor and pointed a laser pointer at a certain angle. Then we put some flour and poured it on the laser beams. and the laser beams bounced off the particles of dust showing us the direction of the beam of laser. Then, we were able to see that the angle that we pointed the laser at, on the opposite side, the laser left at the exact same angle.
I learnt this by thinking
"how will we be able to measure the angle that the ray of light comes and leaves at?"
Then when we are measuring angles, we need a protractor. So, we have to include a protractor. and we need to see the ray to be able to measure it. so, we but some dust in the beam for the beam to bounce off the dust and we were able to see the rays, and we measured the angles they came and left. At 80 degrees, the rays of the laser came and left at the same angle.
We should Know this because in case we want to light some place up for a laser show, we should be able to reflect the light in directions we want to move the light where we want to.
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