Physics - Study Mode

[#1161] The illuminating powers of two sources are compared by
Correct Answer

(B) A photometer

Explanation

Solution: The illuminating powers of two sources are compared by a photometer.

[#1162] Rainbow is seen after rain because of hanging molecules of water which act as
Correct Answer

(B) Mirrors

Explanation

Solution: In optics, a prism is a transparent optical element with flat, polished surfaces that refract light. In a rainbow, raindrops in the air act as tiny prisms. Light enters the raindrop, reflects off of the side of the drop and exits. In the process, it is broken into a spectrum just like it is in a triangular glass prism.

[#1163] The information of brilliant colors in a thin soap film is a consequence of the phenomena of
Correct Answer

(D) Multiple reflection and interference

Explanation

Solution: The information of brilliant colors in a thin soap film is a consequence of the phenomena of multiple reflection and interference.

[#1164] Optic fibres are used in :
Correct Answer

(D) Endoscopy

Explanation

Solution: Optic fibres are used in endoscopy.

[#1165] Purpose of an optical filter is to
Correct Answer

(D) Transmit or absorb light of different colours

Explanation

Solution: Optical filters are devices that selectively transmit light in a particular range of wavelengths, that is, colors, while blocking the remainder. They are commonly used in photography (where some special effect filters are occasionally used as well as absorptive filters), fluorescence microscopy, spectroscopy, clinical chemistry, colour stage lighting, etc.