Question # 1

The least distance of distinct vision is:

Choose an answer

10 cm

25 cm

50 cm

100 cm

In the formula R = N x m for diffraction grating, N denotes:

Choose an answer

No. of lines/cm

No. of lines/meter

Total number of lines

None of above

With age, least distance of distinct vision:

Choose an answer

Increases

Decreases

Is not affected

None is correct

The magnifier forms a virtual image of the object at:

Choose an answer

Least distance of distinct vision

Much farther than the least distance

Both A and B are correct

None of these

The property of light which does not change with the nature of the medium is:

Choose an answer

Frequency

Amplitude

Wavelength

None of these

The velocity of light in vacuum can be changed by changing

Choose an answer

Frequency

Amplitude

Wavelength

None of these

The wave nature of light was proposed by:

Choose an answer

Newton

Thomas Young

Huygen

None of these

A prism splits a beam of white light into seven component colors. This is so because

Choose an answer

Phase of different colors is different

Amplitude of different colors is different

Wavelength of different colors is different

Velocity of different colors is different

To see the minor details of the object by microscope, it should have:

Choose an answer

High magnifying power

High resolving power

Am objective of larger focal length

None of these

The ratio of the size of the image to that of object is called:

Choose an answer

Focal length

Aperture

Linear magnification

Principal axis

Huygen principle is used to determine:

Choose an answer

Speed of light

Location of wavefront

About polarized or unpolarized light

None of them

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

Choose an answer

Equal to

Greater than

Smaller than

None of these

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

Choose an answer

Diffraction

Interference

Polarization

Dispersion

A line which represents the direction of travel of a wave is known as:

Choose an answer

Spherical Wavefront

Locus

Ray

Either B or C

Least distance of distinct vision of an old man possibly becomes:

Choose an answer

A little less than 25 cm

A little more than 25 cm

Much less than 25 cm

None of these

Resolving power in mth order diffraction for grating is given by:

Choose an answer

R = N/m

R = m/N

R = N x m

None of these

More Classes

Other Links

ECAT Pre General Science Physics Chapter 9 Physical Optics 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