* Reflection: Each time light reflects off a mirror, it changes direction. The angle of incidence (the angle the light hits the mirror) equals the angle of reflection.
* Turning Light: To turn light 180 degrees, you need to change its direction by 90 degrees twice.
Here's how you can achieve a 180-degree turn:
* Two Mirrors at 90 Degrees: Two mirrors placed at a 90-degree angle to each other will turn the light 90 degrees.
* Three Mirrors: You need three mirrors to achieve this.
* Place two mirrors at 90 degrees as described above.
* Place a third mirror perpendicular to the first two.
How it works:
1. First 90-degree Turn: Light enters the system and hits the first mirror at a 45-degree angle. This reflects the light 90 degrees.
2. Second 90-degree Turn: The light then hits the second mirror (also at 45 degrees) and is reflected another 90 degrees.
3. Final Reflection: The light then hits the third mirror (at 90 degrees to the first two) and reflects back in the opposite direction, effectively turning it 180 degrees.
Let me know if you'd like a diagram to illustrate this!
