Question

You are asked to design a retro reflector using two mirrors that will reflect a LASER beam by 180° independent of the incident direction of the beam. What should be the angle between the two mirrors?​

Answer 1

Answer:

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Explanation:

Consider the diagram. We are effectively being asked to prove that , for any value of . Now, from trigonometry,

Answer 2

You are asked to design a retro reflector using two mirrors that will reflect a LASER beam by 180° independent of the incident direction of the beam :

Retro reflector :

• A retro reflector is a device or surface that reflects radiation back to its source with minimum scattering.

Two mirrors that will reflect a LASER beam by 180° independent of the incident direction of the beam :

• Mirrors have to be perfectly parallel to each other.
• Surely.
• A simpler mirror may reflect 99.9% of the light, but may cover a broader range of wavelengths.
• Image formation by a plane mirror .
• The principle is illustrated for two mirrors .
• Applications also include simple radar reflectors for ships, and the Lunar Laser Range program based on four retro reflectors placed at the Apollo 11, 14, and 15 sites and the rover.

Angle between the two mirrors:

• Two mirrors set at any angle between 180º and 90º reflect an object 2 times.
• As the angle approaches 90º, you see one mirror reflected in the other, but you do not see additional reflected objects.
• The angel between these mirrors is 120º.
• one composite reflection.