Tag: reflection at plane surface

Questions Related to reflection at plane surface

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physics reflection of light and shadow lateral inversion right or left reflection at plane surface

  1. The laws of reflection of light hold only for plane surfaces

  2. The size of virtual image can be measured by receiving it on screen

  3. Plane mirror alongs form an erect image

  4. Plane mirror may form inverted image

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Correct Option: D
Explanation:

Let solve it by each option

  1. Law of reflection of light holds good for all the mirrors irrespective of their shape and size, hence option A is false
  2.  A virtual image cannot be caught on screen so we cannot measure the size, it is also a false statement
  3. Plane mirror always forms a virtual image, hence it's a false statement
  4. Light rays  which comes from the object  get reflected from plane mirror and reaches to human eye, at this point human feel that reflected ray is coming from the mirror . This is the reason why object looks laterally inverted
  5. Hence option D is the right answer

The sideways reversal of the image by plane mirror is called :

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. lateral inversion

  2. parallax

  3. optical illusion

  4. magic

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Correct Option: A
Explanation:

The sideways reversal of the image by plane mirror is called lateral inversion

Lateral inversion is a feature of plane mirrors, in which:

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. The top part of the object appears to be the bottom part of the image.

  2. The left side of the object appears to be the right side of the image.

  3. Image appears to be inverted upside down and also sideways.

  4. All of the above.

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Correct Option: B
Explanation:
$ \bf{Lateral\ Inversion} $ is the phenomenon in which when looked through a mirror, the left-hand side of an object appears as right-hand side of the image and vice versa.

Hence, the correct answer is OPTION B.

An unlabeled analog clock is kept in front of mirror. Actual time on clock is 3. What is time in the mirror image?

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. 3

  2. 9

  3. 6.15

  4. 9.30

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Correct Option: B
Explanation:

Due to lateral inversion, hour hand of image points to 9. Minute Hand keeps pointing to 12. Hence, time in mirror image is 3.

A boy rotates his arm in clockwise direction in front of mirror. His mirror image rotates its arm in:

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. anticlockwise direction

  2. clockwise direction

  3. oscillatory motion

  4. insufficient info

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Correct Option: A
Explanation:

Due to lateral inversion caused by plane mirror, direction of rotation reverses.

8OYATU in plane mirror appears as :

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. 8OYATU

  2. 8OYatu

  3. UTAYO8

  4. 8oYATU

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Correct Option: C
Explanation:

All letters given are symmetric laterally. When it undergoes reflection, letters reverse order but each looks individually the same.

A boy in front of mirror throws ball from right hand and catches with left hand. The direction of image of ball as seen from image of boy is:

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. Right hand to left hand

  2. Left hand to Right Hand

  3. Right hand to Right Hand

  4. Left Hand to Left Hand

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Correct Option: B
Explanation:

Due to lateral inversion of boy, left appears on right and right on left. 

Why is it difficult to read from image of a book in plane mirror?

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. Due to lateral inversion

  2. Due to scattering

  3. Due to vertical inversion

  4. Due to loss on reflection

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Correct Option: A
Explanation:

On reflection, Objects undergo lateral inversion.

Most of the alphabets are not symmetrical laterally and on reflection produce unrecognizable alphabets. Also, letters on the right appear on the left. This hurt the sequence of letters and makes words and sentences meaningless.

Why is AMBULANCE written laterally inverted on an Ambulance van?

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. It gathers more attention since it is laterally inverted.

  2. Vehicle in front sees a laterally inverted image and perceives it correctly, hence giving side to the ambulance van.

  3. Vehicle in front sees a virtually erect image and perceives it correctly, hence giving side to the ambulance van.

  4. None of the above.

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Correct Option: B
Explanation:

Ambulance is usually in a hurry. In order to convey the vehicle in front that it is an ambulance, it is written laterally inverted. When the driver of the vehicle in front reads through the rear-view mirror, the Image of this inscription, through lateral inversion, form a right oriented image.

Interchange of left and right sides of an object in a plane mirror is known as:

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. reflection

  2. refraction

  3. lateral inversion

  4. all

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Correct Option: C
Explanation:

The interchange of the left and right sides in the image of the object in a plane mirror is known as lateral inversion. In our daily experience, while looking in a mirror, the pocket of the left appears to be on the right of the image is also an example of lateral inversion.