MCQ Questions for Class 7 Physics Light Quiz 6

Which of the following letters of the English alphabet appears exactly like the letter itself in a plane mirror?

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A
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X
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Q
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W

In a plane mirror, the image is formed _________ of the mirror

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Behind
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In front
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Can be both depending on object distance
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None of these

Why is the word AMBULANCE written as (see image) on a hospital van?

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Image gets laterally inverted for the vehicle driver in front of the ambulance so the word AMBULANCE can be seen
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The image gets transversely inverted for the vehicle driver in front of the ambulance so the word AMBULANCE can be seen
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Just for fun
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None of the above

Mirrors used as rear view mirrors in motor vehicles is .................

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Concave mirror
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Plane mirror
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Convex mirror
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All of the above

A convex lens is a convergent lens and is used as a magnifying glass

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True
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False

State whether the following statement is True or False.

A concave lens is a divergent lens and is used in projectors

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True
0%
False

The image formed by a plane mirror is _________.

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Virtual and erect
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Real and Inverted
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Virtual and inverted
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Real and erect

The image formed by a plane mirror is real

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True
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False

What name is given to the point C which is the centre of the hollow sphere of which the spherical mirror was a part?

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Centre of curvature
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Pole
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Focus
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None of these

What is the angle of incidence if a ray is reflected by a plane mirror back along its original path?

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$0^{\circ}$
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$90^{\circ}$
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$45^{\circ}$
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$30^{\circ}$

The letter F appears as ꟻ after reflection in a plane mirror. The image is said to be _______ inverted.

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Laterally
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Vertically
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Both $A$ and $B$
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None of the above

What type of mirror in the inward and outward shining surface of a steel spoon is ?

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Inward surface : Concave mirror
Outward surface : Convex mirror
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Inward surface : Convex mirror
Outward surface : Concave mirror
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Inward surface : Plane mirror
Outward surface : Concave mirror
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Inward surface : Plane mirror
Outward surface : Convex mirror

When you look at yourself in a plane mirror, you see a

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A real image behind the mirror
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Real image on the surface of the mirror
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Virtual image that appears to be behind the mirror
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Virtual image that appears to be in front of the mirror

How many letters of the word 'EXAMINATION' remain unchanged when the word is seen after reflection

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Eight letters
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Six letters
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Nine letters
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Five letters

Which of the following letters will be seen without any change in a plane mirror?

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S
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T
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L
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P

The letter of the English alphabet in front of the plane mirror that does not show lateral inversion is__

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B
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C
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A
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Z

What type of mirror is this?

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Concave mirror
0%
Convex mirror
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Plane mirror
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None of these

Explanation

$\large \textbf{Concept used:}$

Identifying a given mirror.

$\large \textbf{Correct option: A}$

$\large \textbf{Explanation for correct option:}$

Here we can directly see that the reflecting surface is curved inwards, that is, facing towards the centre of the sphere. So it is a

$concave \ mirror$ .

In a Concave Mirror:

$\bullet$ The centre of curvature lies in front of the reflecting surface.

$\bullet$ A number of rays parallel to the principal axis when falls on the mirror, the reflected rays ACTUALLY meet/intersect at a point on the principal axis of the mirror.

$\bullet$ So a real point-sized image is forming at the focus.

State whether the following statement is True or False?

The size of the image produced by plane mirror is the same as that of the objects.

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True
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False

In the image formed by a plane mirror, the left of the object appears on the right and the right appears on the left. This is called lateral inversion.

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True
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False

Explanation

Lateral inversion is a phenomenon in which the left side of object becomes right side of image and right side of object appears as left side of image.

Given statement is

$True$ .

It was the British scientist _______who discovered in 1666 that light consists of seven colours. Fill in the blank.

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Henry
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John Dalton
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Sir Issac Newton
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Einstein

Choose the incorrect statement related to the image formed by a plane mirror:

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a plane mirror always forms a virtual image
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the image formed by a plane mirror may be magnified or diminished
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the image formed by a plane mirror is always unmagnified and laterally inverted
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the image formed by a plane mirror is always unmagnified and erect

When a ray of light strikes a plane mirror at an angle of

$15^o$ with the mirror, what will be the angle through which the ray gets deviated ?

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$15^o$
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$30^o$
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$75^o$
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None of these

A concave mirror cannot be used as a:

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torch reflector
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dentist's mirror
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rear view mirror
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magnifying mirror

The experiment given shows that light :

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Can be reflected
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Is a form enrgy
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Travels in straight line
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Can pass through all objects

Which of the following letters will be seen with some change in a plane mirror?

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M
0%
T
0%
L
0%
W

The nature of the image formed by a plane mirror is :

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virtual and erect
0%
of the same size as the object
0%
laterally inverted
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all the above are correct

Explanation

$\textbf{Explanation:}$

$\bullet$ From the mirror formula $\dfrac{1}{u}+\dfrac{1}{v}=\dfrac{1}{f}$ ; for a plane mirror R = $\infty$ , hence f = $\infty$ . Therefore, $\dfrac{1}{f}=0$

$\bullet$ The formula becomes $\dfrac{1}{u}+\dfrac{1}{v}=0\text{ or }\dfrac{1}{u}=-\dfrac{1}{v}\text{ or -}u=v$

$\bullet$ Thus, the image formed by a plane mirror is always virtual, inverted laterally, and erect.

$\bullet$ It has a characteristic magnification of unity ( $\because \dfrac{v}{u}=1$ ); hence the image is of the same size as that of the object.

$\textit{Answer:}$

$\textbf{Hence, the correct option is (D) all of the above}$

A person looks into the mirror by placing it close to his face. The image of his face was erect, laterally inverted and of the same size. Then, the mirror must be :

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plane
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concave
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convex
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plane or concave

A real image is formed where two or more :

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reflected rays meet
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refracted rays meet
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reflected rays appear to meet
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refracted rays appear to meet

If image is formed behind the mirror, it is:

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real and inverted
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virtual and erect
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virtual and inverted
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real and erect

A person looks into the mirror by placing it close to his face. The image of his face was erect, laterally inverted and of the same size. Then, the mirror must be

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plane
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concave
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convex
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plane or concave

CBSE Questions for Class 7 Physics Light Quiz 6 - MCQExams.com

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Practice Class 7 Physics Quiz Questions and Answers

CBSE Questions for Class 7 Physics Light Quiz 6 - MCQExams.com

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Practice Class 7 Physics Quiz Questions and Answers

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