A ray of light is incident on a plane mirror at an angle x .The angle between incident ray and reflected ray is 120 degree.What is the value of x

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Solution

Dear Student ,
We know from the first law of reflection that , incident angle is equal to the reflected angle .
So the reflection angle will also be x .
Now , $x + x = 120 ° \Rightarrow 2 x = 120 ° \Rightarrow x = 60 °$
Regards

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A ray of light is incident on a plane mirror at an angle x .The angle between incident ray and reflected ray is 120 degree.What is the value of x

Dear Student , We know from the first law of reflection that , incident angle is equal to the reflected angle . So the reflection angle will also be x . Now , x+x=120°⇒2x=120°⇒x=60° Regards

Dear Student ,
We know from the first law of reflection that , incident angle is equal to the reflected angle .
So the reflection angle will also be x .
Now , $x + x = 120 ° \Rightarrow 2 x = 120 ° \Rightarrow x = 60 °$
Regards