HUMAN EYE AND THE COLOURFUL WORLD

The type of lens present in the human eye is.........

• concave lens

• convex lens

• concavo-convex

• plane lens

Nature of the image formed on the retina ...........

• real and erected

• virtual and inverted

• virtual end erect

• real and inverted

If a student cannot see the black board clearly even in sitting in the first bench. The type of defect of his eye is ........

• Myopia

• hypermetropia

• presbyopia

• cataract

When a white light falls on a triangular prism, the colour of light which will deviate the least is

• violet

• green

• blue

• red

Which of the following is the best example of white light?

• Danger signals

• laser light

• sun light

• sodium lamp

Formation of rainbow is due to..........

• refraction of light

• scattering of light

• dispersion of light

• atmospherics refraction

Atmospherics refraction explains the natural phenomena

• twinkling of stars

• Sky appears blue

• Refraction of light through a prism

• rainbow formation

Assertion: Planets do not twinkle

Reason: Light rays do not come from planet

• Assertion and reason are true. Reason is the correct explanation of Assertion

• Assertion and reason are false

• Assertion is false, but reason is true

• Assertion is true, but reason is false

Advanced sunrise and delayed sunset is due to

• Scattering of light

• Atmospheric refraction

• dispersion of light

• reflection of light

The angle between angle of incidence and the angle of emergence is called...........

• angle of emergence

• angle of prism

• angle of deviation

• critical angle