_________________ send signals to the brain

To see an object comfortably and distinctly, we must hold it about _______ cm from our eyes.

The ability of the eye lens to adjust its focal length is called

Myopia and Hypermetropia can be corrected by

The image formed on the retina of the human eye is

The deflection of light by minute particles and molecules of the atmosphere in all direction is called ____________ of light.

When white light enters a prism, it gets split into its constituent colours. This is due to

At noon the sun appears white as [NCERT Exemplar Problems]

The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light

Scattering of light by colloidal solution is known as

THE BAND OF SEVEN COLOURS WHICH IS OBTAINED ON SPLITTING OF WHITE LIGHT INTO ITS SEVEN CONSTITUENT COLOURS IS KNOWN AS

COLOUR WHICH IS HAVING MAXIMUM ANGLE OF DEVIATION IS

IN CASE OF TOTAL INTERNAL REFLECTION LIGHT GOES FROM

IN CASE OF TOTAL INTERNAL REFLECTION, ANGLE OF REFRACTION FOR CRITICAL ANGLE IS

PHENOMENON RESPONSIBLE FOR FORMATION OF RAINBOW

STARS TWINKLE BCOZ OF

SKY APPEARS —————- TO AN ASTRONAUT WHEN HE IS ON EARTH

PHENOMENON OF SPLITTING OF WHITE LIGHT INTO ITS SEVEN CONSTITUENT COLOURS IS KNOWN AS

Which eye disease has blurred images and clouding of the lens?

REFRACTION OF LIGHT TAKES PLACE IN GLASS SLAB

IN CASE OF PRISM ANGLE OF DEVIATION DEPENDS ON

The ability of eye lens to adjust its focal length to form a sharp image of the object at varying distances on the retina is called____________________

Bi-focal lens are required to correct

Refraction of light by the earth’s atmosphere due to variation in air density is called