Light enters the eye through a thin membrane called the

The shape of eye-ball is nearly _________________

Following controls and regulates the amount of light entering the eye

_________________ send signals to the brain

When the light is very bright, the diameter of pupil

When an object is placed closer to eye ____________

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

The farthest point upto which the eye can see objects clearly is ____________ for a normal eye.

Having two eyes facilitates in

A: Increasing the field of view

B: Bringing three-dimensional view

C: Developing the concept of distance/size

Then the correct option is/are

the black opening between the aqueous humour and the lens is called

The image formed on the retina of the human eye is

The muscular diaphragm that controls the size of the pupil is

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

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

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

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

When light rays enter the eye, most of the refraction occurs at the

Scattering of light by colloidal solution is known as

The persistence of vision for human eye is

The colored light that refracts most while passing through a prism is

The change in focal length of an eye tens is caused by the action of the

Near and far points of a young person normal eye respectively are

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____________________

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

The focal length of the eye lens increases when eye muscles

Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?

Human eye acts like a

Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?

The light sensitive cell present on retina and is sensitive to the intensity of light is:

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

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

Atmospherics refraction explains the natural phenomena

Assertion: Planets do not twinkle

Reason: Light rays do not come from planet

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

When white light passes through a prism,

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

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

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

Red light has

angle of deviation will be maximum for-----colour