Light - Study Mode

Show All Answers

[#36] Which of the following lens is used to minimize Myopia?

(A) Convex lens

(B) Concave lens

(C) Cylindrical lens

(D) None of the above

Correct Answer

(B) Concave lens

[#37] The deviation angle is the lowest.

(A) purple

(B) yellow

(C) blue

(D) red

Correct Answer

(D) red

[#38] Consider the following statements. 1. Light of longer wavelength is scattered much more than the light of shorter wavelength. 2. The speed of visible light in water is 0.95 times the speed in vacuum. 3. Radio waves are produced by rapidly oscillating electrical currents. 4. To detect the overspeeding vehicles, police use the Doppler effect of reflected short radio waves. Which of these statements are correct?

(A) Only 1 and 2

(B) Only 1 and 3

(C) Only 2 and 4

(D) Only 3 and 4

Correct Answer

(D) Only 3 and 4

[#39] The focal length of the lens of a normal human eye is about

(A) 25 cm

(B) 1 m

(C) 2.5 mm

(D) 2.5 cm

Correct Answer

(D) 2.5 cm

[#40] The materials through which objects can be seen but not clearly are called . . . . . . . . materials

(A) Translucent

(B) Transparent

(C) Opaque

(D) Lustre

Correct Answer

(A) Translucent