Question # 1

Which is nooptically active

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Sugar

Tartaric acid

Water

Sodium chloride

Fringe spacing is inversely proportional to.

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Wave length

Slit separation

Distance between the slit and screen

Frequency of light

Hygen's principle is used for.

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Explain polarization

Locate the wave front

Find the speed of light

Find the index of refraction

Sodium chloride in a flame gives

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Green light

White light

Red light

Yellow light

According to Hygen's principle, each point on a wave front acts as a source of.

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Secondary wavelet

New wave front

Sound

Primary wavelet

Newton's rings are formed due to phenomenon of.

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Interference

Dispersion

Diffraction

Polarization

Oil film floating on water exhibits colours due to

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Interference

Diffraction

Polarization

All of these

Bending of light around the edges of an obstacle is called.

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Refraction

Polarization

Interference

Diffraction

When one mirror of a Michelson interferometer is moved a distance of 0.5 mm, 2000 fringes and observed, The wavelength of light used is.

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5000 m

50000 A^o

500 cm

2000 A^o

Example of thin film is.

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Soap burble

convex lens

Concave lens

Glass plate

Intensity of light depend on

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Wave length

Amplitude

Velocity

Frequency

A ray of light is a line

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Parallel to wave front

Normal to wave front

Anti-parallel to wave

Any one of these

Interplaner distance can be determined by

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Newton's rings

Bragg's law

Diffraction pattern

Interferometer

The centre of Newton's rings will be

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Dark

Bright

Coloured

Not visible

Bright fringes are also called as

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Minima

Maxima

Wave front

Ray of light

A typical diffraction grating has certain number of lines per centimeter whose range is.

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40 to 50

400 to 5000

400 to 500

4000 to 5000

When newton ring are seen through the transmitted light, then central spot is.

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Dark

Blue

Bright

Red

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11th Class Part 1 Physics Chapter 9 Test Online MCQs With Answers

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