Question # 1

According to Huygen's principle the points on primary wave front can be considered as

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Secondary wavelets

Ray of light

Source of light

None of these

the locus of all pint in the same wave of vibration is called.

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Wave front

Diffraction

Interference

Polarization

If 'N' is number of lines rule don the grating having length 'L' then grating element 'd' is given by.

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N/L

2N/L

L/N

N/2L

Which is nooptically active

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Sugar

Tartaric acid

Water

Sodium chloride

Sodium chloride in a flame gives

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Green light

White light

Red light

Yellow light

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

The fringe spacing in a double slit experiment can be increased by decreasing.

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Wavelength of light

Width of slits

Slit separation

Distance between the slits and the screen

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

Light entering rom air glass does not change in its.

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Frequency

Wavelength

Velocity

Direction

Which one of the following can not be polarized.

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Ultra violet rays

Radio waves

T.V. Waves

Sound waves

Interplaner distance can be determined by

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Newton's rings

Bragg's law

Diffraction pattern

Interferometer

Which phenomenon of light proves that light waves are transverse in nature.

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Refraction

Reflection

Diffraction

Polarization

Example of thin film is.

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Soap burble

convex lens

Concave lens

Glass plate

Standard metal according to Michelson's interferometer is equivalent to

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1553163.5 wave meter

3 x 108meter

15503000 meter

None of these

The phenomenon of polarization of light reveals that sun light is

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Longitudinal waves

Transverse wave

Electromagnetic waves

Monochromatic wave

The wavelength of X-rays is of the order of.

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10^-8 m

10^-10m

10^-5m

10^-4m

An oil film on water surface shows colour due to.

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Diffraction

Interference

Polarization

Dispersion

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

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Refraction

Polarization

Interference

Diffraction

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Physics Fsc Part 1 Chapter 9 Online Test MCQs With Answers

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