Chapter : 11 The Human Eye and the Colourful World

In the human eye, the image of an object is formed at the......

• Iris

• Pupils

• Retina

• Cornea

The phenomenon of......... of light by the colloidal particles gives rise to the Tyndall effect.

• Reflection

• Refraction

• Scattering

• Disperston

Tags

NGSS.MS-PS4-2

How many surface does a triangular prisam have ?

• 6

• 5

• 4

• 3

For persons suffering from near-sightedness the power of the lend used in spectacles is..........

• Positive

• Zero

• Negative

• Infinite

For normal vision, the far point is at ............ distance.

• 25 cm

• 1 m

• 1 m

• Infinite

What is the time difference between actual sunset and apparent sunset ?

• 2 seconds

• 20 seconds

• 2 minutes

• 20 minutes

A myopic person has the far point nearer than infinity.

• True

• False

Far- sightedness can be rectified by using a concave lend of suitable power.

• True

• False

A hypermetropic person has near point farther away from the normal near point (25 cm)

• True

• False

Planets twinkle.

• True

• False