The sky is blue in color due to _______.
- (A) Reflection
- (B) Refraction
- (C) Dispersion
- (D) Diffraction
- (C) Dispersion
Which one of the following can be used to focus sunlight?
- (A) Convex lens
- (B) Concave lens
- (C) Concave mirror
- (D) Plane mirror
- (C) Concave mirror
When natural light is passed through a prism it splits into _______ colors.
- (A) 5
- (B) 6
- (C) 7
- (D) 8
- (C) 7
A beam of which color (light) passing through a prism scatters in seven colors?
- (A) Red
- (B) White
- (C) Black
- (D) Yellow
- (B) White
How many sides does a ‘Prism’ have?
- (A) 4
- (B) 5
- (C) 6
- (D) 7
- (B) 5
Light passing through a prism splits into its colors. It is called:
- (A) Division
- (B) Reflection
- (C) Dispersion
- (D) Dissolution
- (C) Dispersion
Rainbow is a natural phenomenon showing:
- (A) Reflection
- (B) Refraction
- (C) Dispersion
- (D) Polarization
- (C) Dispersion
Camera uses _______ lens to form an image.
- (A) Convex
- (B) Concave
- (C) Condenser
- (D) Transistors
- (A) Convex
In the retina of the eye, the area having no sensory cells is called:
- (A) Iris
- (B) Blind spot
- (C) Cornea
- (D) Dark spot
- (B) Blind spot
Which waves are used by the ‘Radars’?
- (A) Radio
- (B) Light
- (C) Sound
- (D) Magnetic
- (A) Radio