Light Reflection and Refraction Test

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Light Reflection and Refraction Test - 50

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Question 1
1 / -0

All distances are measured from the .............. of mirror

A
Focus

B
Centre of curvature

C
Pole

D
Infinity

Solution

The pole serves as the origin and all the distances are measured from the origin i.e., pole.
Question 2
1 / -0

The ratio of the sine of angle of incidence to the sine of angle of refraction is a constant for :

A
a given pair of media and given colour of light

B
a given pair of media and any colour of light

C
any pair of media and given colour of light

D
any pair of media and any colour of light

Solution

For a given pair of media and given colour of light, the ratio of sine of angle of incidence to the sine of angle of refraction is constant.
Question 3
1 / -0

Change in the direction of light when it passes from one medium to another is called ............

A
reflection

B
refraction

C
diffraction

D
scattering

Solution

$$ \bf{Reflection} $$ is the phenomenon in which light rays on striking a polished surface(such as a mirror) bounce back or are sent back into the same medium.

$$ \bf{Refraction} $$ of light is the phenomenon of bending of light or change in the direction of light, when it passes obliquely from one transparent medium to another.

$$ \bf{Diffraction} $$ is the phenomenon of bending of light waves around the corners of an obstacle or aperture, placed in the path of light beam.

$$\bf{Scattering} $$ is the phenomenon by which a beam of light is redirected or deflected in many different directions when it passes through an imperfect medium due to the interaction with the particles of the medium.

Hence, the correct answer is OPTION B.
Question 4
1 / -0

The curved surface of a shining spoon could be considered as a ...............

A
Curved mirror

B
Plane mirror

C
Concave mirror only

D
None

Solution

The surface of the spoon which is curved inwards can be approximated to be Concave mirror and the surface of the spoon which is bulged outwards can be approximated to be Convex mirror.
Therefore, the curved surface of a shining spoon can be considered as a Curved mirror.

Hence, the correct answer is OPTION A.
Question 5
1 / -0

Centre of curvature of a concave mirror lies .......

A
Behind it

B
In front of it

C
In its centre

D
None

Solution

The reflecting surface of a spherical mirror forms a part of the sphere and the centre of this sphere is called the centre of curvature of the spherical mirror. The centre of curvature of a concave mirror lies in front of it.
Question 6
1 / -0

When a ray of light passes through a rectangular slab, made up of some transparent material other than glass, the emergent ray is

A
Parallel to the incident ray produced

B
Perpendicular to the incident ray produced

C
Oblique to the incident ray produced

D
Inclined to the incident ray produced

Solution

Irrespective of the material it is made up of, when a ray of light passes through a rectangular slab, the emergent ray is parallel to the incident ray produced.
Question 7
1 / -0

When light travels from air to water there is ...........................

A
Reflection of light

B
Refraction of light

C
Diffraction of light

D
Scattering of light

Solution

$$ \bf{Reflection} $$ is the phenomenon in which light rays striking a polished surface(such as a mirror) bounce back or are sent back into the same medium.

$$ \bf{Refraction} $$ of light is the phenomenon of bending of light or change in the direction of light when it passes obliquely from one transparent medium to another.

$$ \bf{Diffraction} $$ is the phenomenon of bending of light waves around the corners of an obstacle or aperture placed in the path of the light beam.

$$\bf{Scattering} $$ is the phenomenon by which a beam of light is redirected or deflected in many different directions when it passes through an imperfect medium due to the interaction with the particles of the medium.

Therefore, when light travels from air to water, there is refraction of light.

Hence, the correct answer is OPTION B.
Question 8
1 / -0

The surface of the spoon which is curved inwards can be approximated to be ($$a$$) .......... mirror and the surface of the spoon which is bulged outwards can be approximated to ($$b$$) ......... mirror.

A
$$(a) = convex, (b) = concave$$

B
$$(a) = concave, (b) = convex$$

C
$$(a) = convexo \ convex, (b) = concavo \ concave$$

D
$$(a) = concavo \ canvex, (b) = convexo \ concave$$

Solution

$$ \bf{Convex\ Mirror} $$ is a curved mirror where the reflective surface bulges out, towards the light source.

$$ \bf{Concave\ Mirror} $$ is a curved mirror where the reflective surface is curved inwards.

Therefore, the surface of the spoon which is curved inwards can be approximated to be Concave mirror.
The surface of the spoon which is bulged outwards can be approximated to be Convex mirror.

Hence, the correct answer is OPTION B.
Question 9
1 / -0

The centre of the sphere from which the spherical mirror has been formed is called ....................

A
Pole

B
Centre of curvature

C
Focus

D
None

Solution

The reflecting surface of a spherical mirror is a part of a sphere. The centre of the sphere is called the centre of curvature of the spherical mirror. It is represented by the letter $$C$$.
Hence option B is correct
Question 10
1 / -0

For a light ray undergoing refraction, $$\dfrac{sin i}{sin r}=$$

A
$$\frac{\mu_2}{\mu_1}$$

B
$$1$$, always

C
$$0$$, always

D
none of these

Solution

According to Snell's law of refraction, $$\mu_1sini=\mu_2sinr$$
$$\frac{sini}{sinr}=\frac{\mu_2}{\mu_1}$$
Where $$\mu_1$$ and $$\mu_2$$ are refractive index of first and second medium respectively.

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Re-Attempt Weekly Quiz Competition

Light Reflection and Refraction Test - 50

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Light Reflection and Refraction Test - 50

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SHARING IS CARING

Question 1

Focus

Centre of curvature

Pole

Infinity

Solution

Question 2

a given pair of media and given colour of light

a given pair of media and any colour of light

any pair of media and given colour of light

any pair of media and any colour of light

Solution

Question 3

reflection

refraction

diffraction

scattering

Solution

Question 4

Curved mirror

Plane mirror

Concave mirror only

None

Solution

Question 5

Behind it

In front of it

In its centre

None

Solution

Question 6

Parallel to the incident ray produced

Perpendicular to the incident ray produced

Oblique to the incident ray produced

Inclined to the incident ray produced

Solution

Question 7

Reflection of light

Refraction of light

Diffraction of light

Scattering of light

Solution

Question 8

$$(a) = convex, (b) = concave$$

$$(a) = concave, (b) = convex$$

$$(a) = convexo \ convex, (b) = concavo \ concave$$

$$(a) = concavo \ canvex, (b) = convexo \ concave$$

Solution

Question 9

Pole

Centre of curvature

Focus

None

Solution

Question 10

$$\frac{\mu_2}{\mu_1}$$

$$1$$, always

$$0$$, always

none of these

Solution

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