Question # 1

Which of the following is evidence of wave nature of light

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Interference

Diffraction

Polarization

All of these

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

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

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10^-8 m

10^-10m

10^-5m

10^-4m

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

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Wave front

Diffraction

Interference

Polarization

A ray of light shows the direction of propagation of light It is line which is.

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Normal to the wave front

Parallax to the wave front

Opposite to the wave front

Equal to the wave front

Interplaner distance can be determined by

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Newton's rings

Bragg's law

Diffraction pattern

Interferometer

Fringe spacing is inversely proportional to.

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Wave length

Slit separation

Distance between the slit and screen

Frequency of light

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

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

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

Huygen's proposed, light energy travels in space from source in

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1578

1678

1778

1868

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

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Refraction

Reflection

Diffraction

Polarization

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

X-ray diffraction has been very useful in determining the structure of

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Hemoglobin

Stars

Galaxies

Stones

The phenomenon of polarization of light reveals that sun light is

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Longitudinal waves

Transverse wave

Electromagnetic waves

Monochromatic wave

Newton's rings are formed due to phenomenon of.

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Interference

Dispersion

Diffraction

Polarization

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

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Dark

Blue

Bright

Red

The centre of Newton's fringe is dark due to.

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Destructive interference

Diffraction

Constructive interference

Polarization

In young's double slit experiment for the interference the central region will be

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Dark

Bright

Coloured

None of these

In red light is used as compare to blue light then fringe spacing.

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Decreases

Remain same

Increases

Becomes zero

In case of point source the shape of wave front is.

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Plane

spherical

Circular

Eliptical

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Physics Fsc Part 1 Chapter 9 Online Test MCQs With Answers

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