Absorbs all the amount of light incident on it

MCQ Questions for Class 7 Physics Light Quiz 1

Choose the wrong statement related to a virtual image.

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Virtual images are always produced by plane mirrors
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Virtual images are always erect
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Virtual image can be obtained on the screen
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Both A and B

An ideal mirror :

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Absorbs all the amount of light incident on it
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Refracts all the light
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Reflects all the light
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None of the above

A plane mirror gives a real image when the incident beam is:

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Wide
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Narrow
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Convergent
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Divergent

Which of the following forms a virtual and erect image for all positions of the object?

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Convex lens
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Plane mirror
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Convex mirror
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Concave mirror

Which of the following is not the case with image formed by a plane mirror:

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It is erect
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It is virtual
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It is diminished
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It is at the same distance as the object

How many colours comprises white light?

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infinite
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seven
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three
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fourteen

The term reflection refers to the bending of light rays:

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when they strike a mirror
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when they enter a different medium
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around a sharp edge
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around the boundary of a narrow aperture

Reflection is the ........ of light off a surface.

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Bouncing
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hitting
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firing
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all

Explanation

Reflection is the $bouncing$ of light off a surface.

Convex lens is always :

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tapering at edges
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thicker in middle
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converges rays at a point
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all of the above

In the case of plane mirror. from the mirror:

distance of the image

$=$ distance of the ........

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Second image
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object
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both
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none

Nature of the image formed by a plane mirror is :

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virtual and erect
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of the same size as the object
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laterally inverted
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all of these

Which of the following best describes image formation by a plane mirror?

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A real image is formed in front of the mirror
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A real image is formed behind the mirror
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A virtual image is formed in front of the mirror
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A virtual image is formed behind the mirror

Which of the following sources of light is different from others ?

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Sunlight
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White light
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Light from a bulb
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Sodium light

Explanation

$Answer:$ option D.

Sunlight, white light, light from bulb when passed from prism will split into its constituent colours, i.e. spectrum will be seen.

But when sodium light is passed, it will not show colour band since it is a monochromatic light (light having only one constituent colour).

An object is kept at

$60$ cm in front of a plane mirror. If the mirror is now moved

$25$ cm away from the object, how is the image shifted from its previous position?

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$25$ cm away
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$25$ cm towards
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$50$ cm away
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$50$ cm towards

State whether true or false:

A concave lens, if kept at a proper distance from an object, can form its real image.

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True
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False

In our houses, we use a _____________ to look at ourselves.

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Convex mirror
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Concave mirror
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Convex lens
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Plane mirror

The E.N.T. (Ear, Nose, Throat) doctor uses a :

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Convex mirror
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Convex lens
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Plane mirror
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Concave mirror

Fill in the blank:

A _____ image is one which can be obtained on a screen.

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virtual
0%
real
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imaginary
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None

The image formed by a plane mirror is :

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At the same distance behind the mirror as the object is in front of it
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Laterally inverted
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Same size as that of the object
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All of the above

Image formed by a plane mirror is

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virtual, behind the mirror and enlarged
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virtual, behind the mirror and of the same size as the object
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real at the surface of the mirror and enlarged
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real, behind the mirror and of the same size as the object.

What type of image is formed by a plane mirror ?

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Upright
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Magnified
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inverted
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all of these

A virtual image is always erect.

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True
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False

The phenomenon that leads to the bouncing back of light rays is called-

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Diffraction
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Reflection
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Dispersion
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Refraction

Explanation

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

$\bf{Reflection}$ 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.

$\bf{Dispersion}$ is the phenomenon of splitting of white light into its component colours (VIBGYOR) on passing through a glass prism.

$\bf{Refraction}$ 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.

Hence, the correct answer is OPTION B.

The image of our face in a plane mirror is

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real
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magnified
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diminished
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Same as the size of the object

The light reflected by a plane mirror may form a real image .......... .

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If the rays incident on the mirror are converging
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If the object is placed very close to the mirror
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If the rays incident on the mirror are diverging
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Under no circumstances

A virtual image formed by a plane mirror is -

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Diminished
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Inverted
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Erect
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Enlarged

If we want to see our full image, then the minimum size of the plane mirror :

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should be twice of our height
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should be of our height
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should be half of our height
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depends upon our distance from mirror

Which mirror is used in movie projectors?

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Convex mirror
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Concave mirror
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Plane mirror
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Parabolic mirror

In case of plane mirror, the size of the image is equal to the size of the object, irrespective of the distance of the object from the mirror.

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True
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False

The image of a real object in a plane mirror is always:

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Virtual
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Erect
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Laterally inverted with respect to the object
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All of these

CBSE Questions for Class 7 Physics Light Quiz 1 - MCQExams.com

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Practice Class 7 Physics Quiz Questions and Answers

CBSE Questions for Class 7 Physics Light Quiz 1 - MCQExams.com

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Practice Class 7 Physics Quiz Questions and Answers

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