Wave Optics Test

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Wave Optics Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

Is light a particle or a wave?

A
Light is a set of waves

B
Both particle and wave approaches help us understand different phenomenon

C
Light is a set of particles

D
Light is schizophrenic i.e. sometimes it behaves like a particle and other times like a wave.

Solution

Light is an electro magnetic wave, it has dual nature and behave as both particle and wave.
Question 2
1 / -0

The propagation of light is best described by-

A
Wave model

B
Dual / schizophrenic model

C
Particle model

D
Rectilinear propagation of light

Solution

According to Maxwell's Electromagnetic theory of light, Light is an electromagnetic wave and it has a dual nature i.e it has both wave nature and particulate nature.
Question 3
1 / -0

Emission and absorption is best described by-

A
Particle model

B
Rutherford"s model of an atom

C
A wave model

D
Dual / schizophrenic model

Solution

Emission and absorption is best described by a particle model.
Question 4
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Wave front is

A
series of points on the wave with same amplitude

B
locus of all adjacent points at which the phase of vibration of a physical quantity associated with the wave is the same

C
locus of all adjacent points at which the Electric field is the same

D
series of points on the wave with same frequency

Solution

A locus of points, which oscillate in phase is called a wavefront; thus a wavefront is defined as a surface of constant phase. The speed with which the wavefront moves outwards from the source is called the speed of the wave.
Question 5
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A ray is an imaginary

A
line from source to horizon

B
line along the direction of travel of the wave

C
line along the direction at an angle to the travel of the wave

D
line along the direction perpendicular to travel of the wave

Solution

The direction or path along which, light energy travels in medium is called ray of light. Rays are the arrows perpendicular to the wavefront in direction of propagation of a wave.
Question 6
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According to Huygens principle

A
Each point on a wave front is a source of secondary waves

B
Each point on a wave front is a sink of secondary waves

C
Travelling at any speed

D
No point on a wave front is a source of secondary waves

Solution

According to Huygens principle, each point of the wavefront is the source of a secondary disturbance and the wavelets emanating from these points spread out in all directions with the speed of the wave. These wavelets emanating from the wavefront are usually referred to as secondary wavelets.
Question 7
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According to Huygens, construction relation between old and new wave fronts is-

A
The new wave front is inclined at an angle to the old wave front.

B
New wave front is backward to old wave front

C
The new wave front is the forward envelope of the secondary wavelet.

D
New wave front is perpendicular to the old wave front

Solution

Huygens’ construction tells us that the new wavefront is the forward envelope of the secondary waves.
Question 8
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Relation between ray and wave front is

A
Rays are perpendicular to wave front

B
Rays are parallel to wave front

C
Rays are at acute angle to wave front

D
Rays are tangential to wave front

Solution

Huygens’ construction tells us that the new wavefront is the forward envelope of the secondary waves. When the speed of light is independent of direction, the secondary waves are spherical. The rays are then perpendicular to the wave fronts.
Question 9
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The superposition principle in relation to displacements produced by a number of waves refers to

A
resultant displacement is the arithmetic sum of the displacements produced

B
resultant displacement is the scalar sum of the displacements produced

C
resultant displacement is the vector sum of the displacements produced

D
resultant displacement is the dot product of the displacements produced

Solution

According to superposition principle, at a particular point in the medium, the resultant displacement produced by a number of waves is the vector sum of the displacements produced by each of the waves.

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Re-Attempt Weekly Quiz Competition

Wave Optics Test - 3

Result

Wave Optics Test - 3

Score

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Rank

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SHARING IS CARING

Question 1

Light is a set of waves

Both particle and wave approaches help us understand different phenomenon

Light is a set of particles

Light is schizophrenic i.e. sometimes it behaves like a particle and other times like a wave.

Solution

Question 2

Wave model

Dual / schizophrenic model

Particle model

Rectilinear propagation of light

Solution

Question 3

Particle model

Rutherford"s model of an atom

A wave model

Dual / schizophrenic model

Solution

Question 4

series of points on the wave with same amplitude

locus of all adjacent points at which the phase of vibration of a physical quantity associated with the wave is the same

locus of all adjacent points at which the Electric field is the same

series of points on the wave with same frequency

Solution

Question 5

line from source to horizon

line along the direction of travel of the wave

line along the direction at an angle to the travel of the wave

line along the direction perpendicular to travel of the wave

Solution

Question 6

Each point on a wave front is a source of secondary waves

Each point on a wave front is a sink of secondary waves

Travelling at any speed

No point on a wave front is a source of secondary waves

Solution

Question 7

The new wave front is inclined at an angle to the old wave front.

New wave front is backward to old wave front

The new wave front is the forward envelope of the secondary wavelet.

New wave front is perpendicular to the old wave front

Solution

Question 8

Rays are perpendicular to wave front

Rays are parallel to wave front

Rays are at acute angle to wave front

Rays are tangential to wave front

Solution

Question 9

resultant displacement is the arithmetic sum of the displacements produced

resultant displacement is the scalar sum of the displacements produced

resultant displacement is the vector sum of the displacements produced

resultant displacement is the dot product of the displacements produced

Solution

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