Question

A number of images of a candle flame can be seen in a thick mirror. The brightest image is:
A. Fourth
B. Second
C. Last
D. First

Answer 1

Hint: A mirror is a surface that reflects the light or the light does not pass through this surface and produces an image. A mirror is mainly made up of a flat piece of glass in which there is a thin layer of silver nitrate or aluminum behind.

Complete answer:
Consider a mirror that is polished from behind. Let a candle be placed in front of this thick mirror.

Here, the flames from the candle are striking the mirror forming the image. Here, several images are forming on the mirror. Mirror consists of two surfaces that is a glass and a polished surface. As a result, we get images of the candle that are of different intensities.Here, the first image will be formed by the reflection of the candle flame from the mirror which is not polished.

The second image will be formed by the reflection of light of the candle flame from the surface which is polished. This surface will reflect the maximum amount of light. The other images are formed by the internal reflections of light inside the mirror. These images will be formed by the less amount of light, as a result, the intensity of light will decrease. Therefore, the second image, which is reflected by the silvering surface, will be the brightest.

Hence, option B is the correct option.

Note:Here, the students must think that they will get only one image, but this is not the case. Thick mirrors are the mirrors that are silver coated from the back. These silver-coated mirrors will undergo maximum deflections of the light. Therefore, we got many images of the candle and not the one image of the candle.