Which one of the following is not true about the image formed by a plane mirror?

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Submitted by examrobotsa on

Q: (CDS-I/2020)

Which one of the following is not true about the image formed by a plane mirror?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,32,27,10,6,32,11

keywords: 

{'plane mirror': [0, 0, 0, 7], 'mirror': [0, 0, 0, 1], 'real image': [0, 0, 0, 1], 'image': [0, 1, 3, 23], 'front': [1, 0, 4, 7], 'object': [1, 0, 11, 43]}

In the context of a plane mirror, each option refers to a different property of the image formed:

1. `It is of the same size as the object` is true - a plane mirror does not magnify or reduce the size of the image.

2. `It is laterally inverted` is also true - something moving right in reality appears to move left in the reflection.

3. `It is a real image` is the correct answer because it is not true. A real image is formed where light from an object actually comes together or converges, and can be projected onto a screen. But the image formed by a plane mirror appears to be where the light is not actually present, it is virtual not real.

4. `It is formed as far behind the mirror as the object is in front` is true - this is why the image in a mirror seems to be "inside" the mirror at the same distance as the object is from it.

In conclusion, the third option is not true about the image formed by a plane mirror.