Tag: characteristics of an image formed by a plane mirror

Questions Related to characteristics of an image formed by a plane mirror

In a plane mirror, the image is as far behind the mirror as the object is in front of it. 

evs reflection of light by plane surfaces characteristics of an image formed by a plane mirror formation of image in a plane mirror characteristics of the image formed by a plane mirror

  1. True

  2. False

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Correct Option: A
Explanation:

The distance of image from the mirror is distance of image formed behind the plane mirror.

The given statement is $true$

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. 

evs reflection of light by plane surfaces characteristics of an image formed by a plane mirror formation of image in a plane mirror characteristics of the image formed by a plane mirror

  1. True

  2. False

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Correct Option: A
Explanation:

The image formed by a plane mirror is always virtual (meaning that the light rays do not actually come from the image), upright, and of the same shape and size as the object it is reflecting. A virtual image is a copy of an object formed at the location from which the light rays appear to come.
Hence, the statement is true.

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

evs reflection of light by plane surfaces characteristics of an image formed by a plane mirror formation of image in a plane mirror characteristics of the image formed by a plane mirror

  1. a plane mirror always forms a virtual image

  2. the image formed by a plane mirror may be magnified or diminished

  3. the image formed by a plane mirror is always unmagnified and laterally inverted

  4. the image formed by a plane mirror is always unmagnified and erect

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Correct Option: A,B
Explanation:

As the image formed by a plane mirror is always virtual,upright, and of the same shape and size as the object it is reflecting.
Hence, option B is incorrect statement.

When the angle between two plane mirrors is $\displaystyle { 60 }^{ o }$, how many multiple images will be formed by the mirrors?

evs reflection of light by plane surfaces characteristics of an image formed by a plane mirror formation of image in a plane mirror characteristics of the image formed by a plane mirror

  1. $6$

  2. $7$

  3. $4$

  4. $5$

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Correct Option: D
Explanation:

Number of images will be given by,

 
                  =$\dfrac{360}{\theta} -1$


given,  $\theta=60$

               $\therefore$    Number of images will be 5.

When a divergent beam of light is incident on a plane mirror, the image formed is

evs reflection of light by plane surfaces characteristics of an image formed by a plane mirror formation of image in a plane mirror characteristics of the image formed by a plane mirror

  1. Upright and real

  2. Upright and virtual

  3. Inverted and virtual

  4. Inverted and real

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Correct Option: B
Explanation:

It should be remembered that plane mirror always form virtual and errect image and that too of same but laterally inverted.

A virtual image formed by a plane mirror is -

evs reflection of light by plane surfaces characteristics of an image formed by a plane mirror formation of image in a plane mirror characteristics of the image formed by a plane mirror

  1. Diminished

  2. Inverted

  3. Erect

  4. Enlarged

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Correct Option: C
Explanation:

A plane mirror always forms erect image and of same size as well.

An object is placed at a distance of $0.25m$ in front of a plane mirror. The distance between the object and the image is:

evs reflection of light by plane surfaces characteristics of an image formed by a plane mirror formation of image in a plane mirror characteristics of the image formed by a plane mirror

  1. $0.5m$

  2. $1m$

  3. $0.25m$

  4. $0.75m$

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Correct Option: A
Explanation:

For reflection from a plane mirror, distance between object and mirror $=$ distance between mirror and the image$=0.25m$

So, distance between object and image$=$ (distance between object and mirror) $+$ (distance between mirror and image) $=(0.25+0.25)m=0.5m$

If $x _1$ be the size of the magnified image and $x _2$ the size of the diminished image in Lens Displacement Method, then the size of the object is

evs reflection of light by plane surfaces characteristics of an image formed by a plane mirror formation of image in a plane mirror characteristics of the image formed by a plane mirror

  1. $\sqrt{x _1x _2}$

  2. $x _1x _2$

  3. $x _1^2x _2$

  4. $x _1x^2 _2$

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Correct Option: A
Explanation:

The size of the object in accordance with the Fresnel's displacement law is given by $\sqrt{x _1x _2}$.

If a mirror forms a virtual image of a real object then

evs reflection of light by plane surfaces characteristics of an image formed by a plane mirror formation of image in a plane mirror characteristics of the image formed by a plane mirror

  1. it must be a convex mirror.

  2. it must be concave mirror.

  3. it must be a plane mirror.

  4. it may be any of the mirrors mentioned above.

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Correct Option: D
Explanation:

A mirror that forms a virtual image of a real object is :
(a) Concave mirror: When object is placed only between pole and focus of the mirror.
(b) Convex mirror: For all positions of objects, image is virtual.
(c) Plane mirror: Image formed is virtual.

Amount of light reflected depends upon

evs reflection of light by plane surfaces characteristics of an image formed by a plane mirror formation of image in a plane mirror characteristics of the image formed by a plane mirror

  1. Nature of material of the object

  2. Nature of the surface

  3. Smoothness of the surface

  4. All of these

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Correct Option: D
Explanation:

Amount of light reflected depends upon nature of material of the object, nature of the surface and smoothness of the surface. If the material is opaque for an incident light, then the total amount of incident light gets reflected. Otherwise, a part of the incident light can get transmitted.  If the surface is smooth, the reflection is more, otherwise reflected light can get scattered.