Question

A thick glass slab with a silvered side forms multiple images on account of

• A. reflection of light
• B. dispersion of light
• C. refraction of light
• D. both reflection and refraction of light

Answer 1

The correct option is D

both reflection and refraction of light

The explanation for the correct option:

Option D

1. Reflection of light is the phenomenon of bouncing back of light in the same medium on striking the surface of any object.
2. Refraction of light is the phenomenon of change in the path of light while going from one medium to another.
3. A thick mirror has two surfaces.
4. When the light falls on the upper surface it is divided into two parts, one is reflected and the other is refracted.
5. The refracted part enters the mirror and again is reflected back. Multiple refraction and reflection lead to a number of transmitted and reflected waves with different intensities.
6. So. option D is correct.

The explanation for the incorrect option:

Option A is incorrect

1. When the light falls on the upper surface it is divided into two parts, one is reflected and the other is refracted.
2. So, option A is incorrect.

Option B is incorrect

1. When visible light separates into its seven colors, then this separation of visible light is known as dispersion of light.
2. Since the glass slab has a silvered side.
3. So, multiple images are not formed.
4. So, option B is incorrect.

Option C is incorrect

1. Refraction of light is the phenomenon of change in the path of light while going from one medium to another.
2. But, when the light falls on the upper surface it is divided into two parts, one is reflected and the other is refracted.
3. The refracted part enters the mirror and again is reflected back. Multiple refraction and reflection lead to a number of transmitted and reflected waves with different intensities.
4. So, option C is incorrect.

Hence, option D is correct.