Question # 1

Bright fringes are also called as

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Minima

Maxima

Wave front

Ray of light

Intensity of light depend on

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Wave length

Amplitude

Velocity

Frequency

The Bragg's equation is given by

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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

The centre of Newton's rings will be

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Dark

Bright

Coloured

Not visible

The blue colour of sky is due to

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diffraction

Reflection

Polarization

Scattering

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

In case of point source the shape of wave front is

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Circular

Spherical

Elliptical

Square

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

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Decreases

Remain same

Increases

Becomes zero

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

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Physics English Medium Fsc Part 1 Chapter 9 Online MCQs Test MCQs With Answers

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