Question # 1

When the object lies between F and 2F, the image formed by is formed at:

Choose an answer

Real

Virtual

Diminished

Erect

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

Choose an answer

1

0.2

2

0.1

For the virtual image, option _______ is not correct:

Choose an answer

1/p = 1/f -1/q

1/f = 1/p -1/q

1/p=1/p-1/f

1/p=1/f+1/q

A ray passing through optical center of a lens, after refraction:

Choose an answer

Passes through focus

Go deviated

Retraces its path

Both B and C

The locus of all the points in the same phase of vibration is called:

Choose an answer

Wave packet

Wave front

Wave number

None of them

Angle between the ray of light and the corresponding wavefront is:

Choose an answer

0°

60°

90°

120°

The velocity of light in vacuum can be changed by changing

Choose an answer

Frequency

Amplitude

Wavelength

None of these

With age, least distance of distinct vision:

Choose an answer

Increases

Decreases

Is not affected

None is correct

According to Huygen's principle

Choose an answer

light travels in straight line

Light is a transvers wave

Light has dual nature

All points on the primary wave-front are the sources of secondary wavelets

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

To observe interference of light, the condition, which must be met with is that the sources must be:

Choose an answer

Monochromatic

Phase coherent

Both of above

None of above

The appearance of the colour in the soap (oil) film results from:

Choose an answer

Dispersion

Interference

Reflection

Refraction

The cause of mirage observed in deserts in bright sunlight is due to

Choose an answer

Refraction of light

Reflection of light

Scattering of light

Total internal reflection of light

In order to get interference using two light rays

Choose an answer

The sources should be monochromatic and coherent

The sources should have the same frequency

Superposition should be linear

All of these

Which one of the following can act approximately as a source of monochromatic light;

Choose an answer

Neon lamp

Fluorescent tube

Sodium lamp

None of these

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

Choose an answer

Bright

Dark

Any of A and B

None of these

More Classes

Other Links

Physics ECAT Pre Engineering 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