Two inclined mirrors problem

[Amith2006]

Inclined mirror problem

Sir,
Please see if it is right.
1)A ray of light makes an angle of 10 degrees with the horizontal and strikes a plane mirror which is inclined at an angle y to the horizontal. What is the angle y for which the reflected ray becomes vertical?
I solved it in the following way:
Given that angle(CBF) = 90, angle(CBD) = 10, angle(DBE) = angle(EBF) = m
i.e. 2m + 10 = 90
m = 40
Now, y + 10 + 40 = 90
y = 40

Is it right?

 

[maverick280857]

Yes I think this is correct...you can check that the angles are consistent with orthonormality once you have the values, yourself.

 

[kyle8921]

I cannot confirm the accuracy of your solution without further information about the problem. However, your approach seems reasonable and your solution appears to be correct based on the given information. It is always important to double-check your calculations and consider any potential sources of error in your solution. Additionally, it would be helpful to provide a diagram or more context for the problem to ensure a complete understanding.