00:01
In this question, we have a room with a mirrored ceiling.
00:06
So the room is 5 meters wide.
00:11
Okay, so 5 meters.
00:16
And then the height is 3 meters.
00:20
And then the ceiling is mirrored.
00:25
So it's a mirror.
00:27
Okay, we want to, so there's a laser beam aim at this point at an angle 5.
00:35
Okay and we want the beam to hit the midpoint of the wall okay which is here so to draw the diagram problem so this is a reflection problem okay so we need to kind of draw out the situation okay so okay so this is where the laser beam is at five meters this is where we want to hit so know that angle of incidence is equal to angle of reflection.
01:34
Okay.
01:38
Yeah, so, and then this is three meters.
01:44
Okay, so one way to kind of solve the problem is, so we know that the kind of treat the object to be here.
01:54
And then the image will be somewhere here.
01:58
Okay, so there will be a light ray that goes from the object to be here.
02:02
The image to the point of interest, right? and then we just direct back to here.
02:16
And so this is the light ray that the laser beam would travel...