Recent questions tagged optics and sound

+3 votes

1 answer

Consider the following statement: The principle of total internal reflection is applicable to explain the

asked Apr 7, 2019 in Class 12 by kratos

+3 votes

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Consider the following statements: 1. If magenta and yellow ******** circles intersect, the intersected area will have red colour.

asked Apr 6, 2019 in Mathematics by kratos

+3 votes

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Assertion (A) : A jet aircraft moving at Mach Number equal to 1 travels faster at an altitude of 15 km

asked Apr 5, 2019 in Mathematics by kratos

+3 votes

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Which of the two is scattered more easily : light of shorter wavelengths or light of longer wavelengths ?

asked Mar 31, 2019 in Class 10 by kratos

+3 votes

1 answer

Assertion (A) : A jet aircraft moving at Mach Number equal to 1 travels faster at an altitude of 15 km than while moving .

asked Mar 29, 2019 in JEE by kratos

+3 votes

1 answer

If the velocity of sound in air is 336m/*,the maximum length of a closed pipe that would produce just audible sound is

asked Mar 24, 2019 in JEE by kratos

+3 votes

1 answer

Consider the following statements: 1. If a person looks at a coin which is in a bucket of water,

asked Mar 22, 2019 in Class 11 by kratos

+3 votes

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"Rainbow is an example of dispersion of sunlight." Justify this statement by explaining, with the help of a labelled diagram,

asked Mar 12, 2019 in Class 10 by kratos

+1 vote

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Given below are two statements, one labelled as Assertion (A) and other labelled as Reason (R).

asked Feb 22, 2019 in Mathematics by kratos

+1 vote

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Assertion (A) : Small glass beads fixed on traffic signals glow brightly when light falls upon them.

asked Feb 15, 2019 in Mathematics by kratos

+3 votes

1 answer

The optical fibre works on the principle of: (a) Scattering (b) Refraction

asked Feb 14, 2019 in Class 12 by kratos

+3 votes

1 answer

Which of the following is not due to total internal reflection? (a) Working of optical fibre

asked Feb 2, 2019 in Class 12 by kratos

+2 votes

1 answer

For reproducing sound, a CD (Compact Disc) audio player uses a : (a) quartz crystal (b) titanium needle

asked Jan 13, 2019 in Computer by kratos

+3 votes

1 answer

The phenomena of light responsible for the working of the human eye is

asked Jan 8, 2019 in Class 12 by kratos

+3 votes

1 answer

Suppose a rocket ship is receding from the earth at a speed of 2/10 ^th the velocity of light.

asked Dec 31, 2018 in Class 12 by kratos

+2 votes

1 answer

Which one of the following statements is not correct? (a) The velocity of sound in air increases with the increase of temperature

asked Dec 31, 2018 in Mathematics by kratos

+1 vote

1 answer

The intensity of sound during me festival season increased by 100 times. This could imply a decibel level rise from.

asked Dec 17, 2018 in Class 12 by kratos

+1 vote

1 answer

Consider the following statements: 1. Light of longer wavelength is scattered much more than the light of shorter wavelength.

asked Nov 28, 2018 in Class 10 by kratos

+1 vote

1 answer

Assertion (A): Radio waves bend in a magnetic field. Reason (R): Radio waves are electromagnetic in nature.

asked Nov 28, 2018 in Class 12 by kratos

+1 vote

1 answer

Consider the following natural phenomena: 1. Terrestrial heating 2. Reflection of light

asked Nov 21, 2018 in Class 12 by kratos

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