Question # 1

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

Choose an answer

Increase

Decreases

Remain same

Becomes zero

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

Choose an answer

N/L

2N/L

L/N

N/2L

The blue colour of sky is due to

Choose an answer

diffraction

Reflection

Polarization

Scattering

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

Choose an answer

Plane

spherical

Circular

Eliptical

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

Choose an answer

Hemoglobin

Stars

Galaxies

Stones

Light waves emitted from a source spread in

Choose an answer

Specific direction

All direction

Upward direction

None of these

Bright fringes are also called as

Choose an answer

Minima

Maxima

Wave front

Ray of light

The property of bending of light around obstacles is

Choose an answer

Interference

Diffraction

Polarization

Superposition

Which of the following is evidence of wave nature of light

Choose an answer

Interference

Diffraction

Polarization

All of these

Michelson's interferometer can be used ot find the

Choose an answer

Velocity of light

Wavelength of light

Velocity of sound

Wavelength of sound

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

Choose an answer

40 to 50

400 to 5000

400 to 500

4000 to 5000

Newton's rings are formed due to phenomenon of.

Choose an answer

Interference

Dispersion

Diffraction

Polarization

The light energy travels in space as waves was firstly proposed by

Choose an answer

Maxwell

Young

Einsten

Hydrogen

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

Choose an answer

Decreases

Remain same

Increases

Becomes zero

Which is nooptically active

Choose an answer

Sugar

Tartaric acid

Water

Sodium chloride

Interplaner distance can be determined by

Choose an answer

Newton's rings

Bragg's law

Diffraction pattern

Interferometer

Standard metal according to Michelson's interferometer is equivalent to

Choose an answer

1553163.5 wave meter

3 x 108meter

15503000 meter

None of these

Sodium chloride in a flame gives

Choose an answer

Green light

White light

Red light

Yellow light

More Classes

Other Links

Physics Fsc Part 1 Chapter 9 Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer