Question

Match the statements of Column A with those of Column B.

Column A	Column B
(A) Blue color of sky (B) Mirage (C) Twinkling of stars (D) Formation of rainbow	(a) Total internal reflection (b) Scattering of light (c) Dispersion (d) Refraction

• A. A→b; B → a; C→d; D→C;
• B. A→a; B→b; C→C; D→d
• C. A→b; B→ c; C → b; D→a;
• D. A→C; B→d; C→b; D→ ́a;

Answer 1

The correct option is A

A→b; B → a; C→d; D→C;

Part (A) Blue color of the sky -

1. The sky appears blue in color because the sunlight consist of various colors of light having different wavelength and when these lights with different wavelength interacts with the particles in atmosphere the get scattered
2. Since blue color has the shortest wavelength so it is scattered most and we see the sky as blue in color.

Thus A)- b)

Part (B) Mirage -

1. Mirage is the optical illusion formed basically due to Total internal reflection.
2. It generally occurs at the dessert area near the seas .

Thus B)- a)

Part (C) Twinkling of stars -

1. The twinkling of the stars is the phenomenon that occurs due to the refraction of the light coming from the star.
2. Due to the refraction of light from multiple layers of earth and atmosphere light, sometimes reaches the human eye and sometimes it vanishes so this causes the twinkling effect.

Thus C)-d)

Part (D) Formation of the rainbow -

1. When the sunlight reaches the water droplet, the different wavelength of light gets dispersed from their path due to change in velocity as they enters the different medium.
2. Hence we see light dispersed in seven colors called rainbow.

Thus D)-c)

Hence the correct answer is option (a) A→b; B → a; C→d; D→C;