HUMAN EYE & COLOURFUL WORLD

When white light passes through a prism,

• red bends more, violet bends least

• red bends least, violet bends most

• dispersion doesn't occur

• refraction doesn't occur

The splitting of white light into the seven colors when it passes through a transparent material is called

• Refractrion

• Dispersion

• Reflection

• Diffraction

A ray of white light enters the raindrop and undergoes __________ and __________ to form a spectrum.

• refraction; dispersion

• reflection; dispersion

• dispersion; diffraction

• scattering; dispersion

The refraction of light passed by the Earth’s Atmosphere having air layers of varying __________ is called atmospheric refraction.

• optical densities

• densities

• volumes of air

• winds

Red light has

• longer wavelength

• shorter wavelength

• longer frequency

• none of the above

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

• different refractive index for different wavelength of each colour

• each colours has same velocity in the prism.

• prism material have high density.

• Scattering of light

The air layer of atmosphere whose temperature is less then the hot layer behave as optically

• denser medium

• rarer medium

• inactive medium

• either denser or rarer medium

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

• moves fastest in air

• is absorbed the most by smoke or fog

• is scattered the least by smoke or fog

• is scattered the most by smoke or fog

What is happening in this picture?

• The water is making the pencil bigger
• the water is refracting (bending) the pencil
• the water is refracting (bending) the light to make the pencil look bent
• light is being absorbed

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

• scattering

• interference

• tyndell effect

• Reflection