Question # 1

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

Choose an answer

Neon lamp

Fluorescent tube

Sodium lamp

None of these

Monochromatic light means wave of

Choose an answer

Same frequency

Same colour

Same Wavelength

All of them

Electromagnetic waves transport

Choose an answer

Energy only

Momentum only

Both A and B

None is correct

Laws of reflection and refraction can also be explained by

Choose an answer

Particle nature of light

Quantum nature of light

Wave nature of light

Complex nature of light

Light has

Choose an answer

Wave nature

Dual nature

Particle nature

None of them

In case of destructive interference of two waves, the amplitude of the resultant wave will be __________ either of the waves.

Choose an answer

Greater than

Smaller than

Equal to

None of these

In case of constructive interference of two waves, the amplitude of the resultant wave is __________ either of the waves

Choose an answer

Greater than

Equal to

Smaller than

None of these

When the source of light is at very large distance, the shape of wavefront is

Choose an answer

Spherical

Cylindrical

Plane

None of these

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

Choose an answer

Wave pocket

Wavefront

Wave number

None of these

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

Two sources are said to be coherent if they have

Choose an answer

Same amplitude

Same wavelength

Definite phase relation with each other

None of them

The appearance of colours in the soap (or oil) film results from

Choose an answer

Dispersion

Interference

Reflection

Refraction

Speed of light in vacuum depends upon

Choose an answer

Frequency

Wavelength

Amplitude

None of these

Huygen's principle states that

Choose an answer

Light travels in straight line

Light has dual nature

Either of these

None of these

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

More Classes

Other Links

Physics ECAT Pre Engineering Chapter 10 Optical Instruments 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