Two plane mirrors make an angle of 30 degrees. A light ray enters the system and is reflected once off each mirror. Through what angle is the ray turned?
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I don't what to say because I'am new I'am so sorry
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Answer:
120°
Explanation:
Given in the question that angle made by two plane mirrors is 30°
Step 1
Angle at which the first light ray hit the mirror is 30° (corresponding angles)
Step 2
Sum of angle at which the first light ray hit the mirror and angle to the normal
= 90°
Step 3
90° - 30° = 60° angle with ray of light to the normal
Step 4
Base on Law of reflection, ray of light is turned off the first mirror at 60° + 60° = 120° angle.
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