Question
Download Solution PDFA ray of light meets a plane mirror at an angle of incidence 15°. What will be the deviation of the ray after reflection?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT
- Reflection: The phenomena in which a light ray is sent back into the same medium from which it is coming, on interaction with boundary, is called reflection.
- Laws of reflection:
- The angle of incidence (θi ) = Angle of reflection (θr )
- The incident ray, the reflected ray, and the normal to the surface of incidence always lies in the same plane.
- The angle of minimum deviation is defined as the smallest angle through which light is bent by a prism.
- The relationship between the angle of incidence, angle of emergence and angle of minimum deviation is given by
⇒ δ = 180° - (i +r)
CALCULATION:
Given - Angle of incidence (i) = 15° and Angle of reflection (r) = 15°
- Angle of deviation is given by
⇒ δ = 180° - (i + r)
⇒ δ = 180° - (15° + 15°) = 180° - 30° = 150°
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