Q. The mirror used in search light is –
✅ Correct Answer: (D)
None of these
Explanation: A search light produces an intense parallel beam of
light. This requires a reflector of large aperture. When
a source is placed at the focus of a large concave
mirror only the paraxial rays (not the marginal rays) are
reflected as parallel beam, but when a source is placed
at the focus of parabolic mirror all the rays are reflected
as an intense parallel beam.
Explanation by: Gopal Sharma
A search light produces an intense parallel beam of
light. This requires a reflector of large aperture. When
a source is placed at the focus of a large concave
mirror only the paraxial rays (not the marginal rays) are
reflected as parallel beam, but when a source is placed
at the focus of parabolic mirror all the rays are reflected
as an intense parallel beam.
light. This requires a reflector of large aperture. When
a source is placed at the focus of a large concave
mirror only the paraxial rays (not the marginal rays) are
reflected as parallel beam, but when a source is placed
at the focus of parabolic mirror all the rays are reflected
as an intense parallel beam.