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 thought...incidence ray and reflection ray...
theyatin:
you thought good dear, but the incident ray is reflected and again reflected from the second mirror now we need to find what is actual deviation from the actual angle of incident.
ya...you are also right...i al saying that 'incident ray and reflected ray are eaqual'
ok...sorry i was npt Knowing correct answer...in my way i said the answer...
Answered by
1
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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