Wave Optics Test

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Wave Optics Test - 19

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Weekly Quiz Competition

Question 1
1 / -0

Which one of the following is more monocromatic?

A
Laser beam

B
White light

C
Sodium light

D
Mercury light

Solution

Monochromatic light is light made up of one single pure frequency.white light, which is light that contains all frequencies, That means the sum of red, yellow, green, blue and violet. Some light sources send out monochromatic light such as lasers beam.
hence,option A is correct.
Question 2
1 / -0

Corpuscular theory of light was advanced by

A
Huygen

B
Newton

C
Maxwell

D
Hertz

Solution

$$Answer:$$ B
The corpuscular theory was largely developed by Sir Isaac newton. Newton's theory remained in force for more than 100 years and took precedence over Huygen's wave front theory, partly because of Newton’s great prestige. When the corpuscular theory failed to adequately explain the diffraction, interference and polarization of light it was abandoned in favour of Huygens' wave theory.
Question 3
1 / -0

The speed at which the current travels in a conductor, is nearly.

A
$$3 \times 10^4 ms^{-1}$$

B
$$3 \times 10^5 ms^{-1}$$

C
$$4 \times 10^6 ms^{-1}$$

D
$$3 \times 10^8 ms^{-1}$$

Solution

The speed of the current in the conductor is the same as the speed of light in the vacuum which is $$3\times 10^{8} {\dfrac{m}{s}}$$
Question 4
1 / -0

Albert Einstein used corpuscular theory to explain :

A
$$E=mc^2$$

B
The photoelectric effect

C
Quantisation of charge

D
magic of light

Solution

The photoelectric effect
In 1905, Albert Einstein published a paper in advancing hypothesis that the light energy I'd being carried in discrete quantized packets to explain experimental data from photoelectric effect. This model contributed the development of quantum mechanics.
Photoelectric effect refers to the emission, or rejection of electrons grim the surface of generally a metal in response to the incident light.
Question 5
1 / -0

Wave nature of light is verified by ___________.

A
interference

B
reflection

C
photoelectric effect

D
refraction

Solution

A.
Interference
Christian Huygens verified the wave nature of light using interference.
Question 6
1 / -0

Who amongst the following used corpuscular theory to explain the nature of light?

A
Max Planck

B
Newton

C
Young

D
Einstein

Solution

Newton was the first to use corpuscular theory to explain the nature of light. He was able to successfully reflection and refraction using this theory.
Question 7
1 / -0

The wave-like character was experimentally proved for light by

A
Newton

B
Young

C
Maxwell

D
Huygens

Solution

Newton's particle theory remained accepted for a long time when it was challenged by the double-slit experiment of Thomas Young (1773-1829) in 1801. This experiment clearly established that light coming from two coherent sources interferes and produces maxima and minima depending on the path difference.
Question 8
1 / -0

Who first proposed that light was wave-like in character ?

A
Huygens

B
Newton

C
Young

D
Maxwell

Solution

Huygens
In 1678, Dutch physcist, christian Huygens beived that light was made up of waves vibrating up and down perpendicular to the direction of the light travels, and therefore formulated a way of visualising wave propagation. This became known as Huygens Principe.
Question 9
1 / -0

During the $$19th$$ century, light was considered to be a stream of particles called :

A
atoms

B
electrons

C
corpuscles

D
quantas

Solution

The corpuscular theory of light is proposed by newton in 1704. It is referred as particle theory or newton’s theory of light.

According to this theory,

a. Light is made up of tiny particles called corpuscles having negligible mass. These particles (corpuscles) are perfectly elastic.

b.These tiny particles always travel in straight line in all directions.

c. These corpuscles ravel at very high velocity.
These corpuscles are of different sizes. The different color of light is due to different sizes.
Question 10
1 / -0

When light falls on matter, it can produce :

A
mechanical effect

B
chemical effect

C
heating effect

D
all the above

Solution

since photons have momentum and energy, they can produce all the three stated effects

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Wave Optics Test - 19

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Wave Optics Test - 19

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SHARING IS CARING

Question 1

Laser beam

White light

Sodium light

Mercury light

Solution

Question 2

Huygen

Newton

Maxwell

Hertz

Solution

Question 3

$$3 \times 10^4 ms^{-1}$$

$$3 \times 10^5 ms^{-1}$$

$$4 \times 10^6 ms^{-1}$$

$$3 \times 10^8 ms^{-1}$$

Solution

Question 4

$$E=mc^2$$

The photoelectric effect

Quantisation of charge

magic of light

Solution

Question 5

interference

reflection

photoelectric effect

refraction

Solution

Question 6

Max Planck

Newton

Young

Einstein

Solution

Question 7

Newton

Young

Maxwell

Huygens

Solution

Question 8

Huygens

Newton

Young

Maxwell

Solution

Question 9

atoms

electrons

corpuscles

quantas

Solution

Question 10

mechanical effect

chemical effect

heating effect

all the above

Solution

User

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