For which of the given is luminous efficiency maximum ?

May 2, 2022

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For which of the given is luminous efficiency maximum ?

Q. For which of the given is luminous efficiency maximum ?

A. Sodium vapour lamp

B. Mercury vapour lamp

C. Arc lamp

D. Tungsten filament lamp

Answer: Sodium vapour lamp

For which of the given is luminous efficiency maximum ?

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The focal length of a concave mirror is f and the distance of the object to the principal focus is p . Then the ratio of the size of the image to the size of the object is

For which of the given is luminous efficiency maximum ?

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When light travels from one medium to other whose refractive index is different, then which of the given will change?

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