human eye and colorful world

An image is formed on

• iris

• pupil

• retina

• cornea

Light enters the eye through a thin membrane called the

• Iris

• Pupil

• Retina

• Cornea

Following controls and regulates the amount of light entering the eye

• Iris

• Pupil

• Retina

• Corena

_________________ send signals to the brain

• Optical nerve

• Aqueous Humour

• Viterous humour

• Eye lens

When the light is very bright, the diameter of pupil

• Expends

• Contract

• Remain same

• All of these

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

• 10

• 25

• 15

• infinity

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

• Accommodation

• Accomplish

• Composition

• None of the above

Myopia and Hypermetropia can be corrected by

• Concave and plano-convex lens

• Concave and convex lens

• Convex and concave lens

• Plano-concave lens for both defects.

The image formed on the retina of the human eye is

• virtual and inverted

• real and inverted

• virtual and erect

• real and erect

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

• scattering

• interference

• tyndell effect

• Reflection