Light

A part of the retina that does not have any rods and cones and is insensitive to light is

• Cornea

• Lens

• Iris

• Blind spot

The ability of an eye to continue to see an image for a very short period of time even after the object is removed is called

• Reflection of light

• Dispersion of light

• Persistence of light

• Accommodation

On increasing the angle between the two reflecting surfaces , the number of images

• Deceases

• Increases

• Does not change

• None of these

The number of images formed when the angle between two mirrors is 24 degree is

• 18

• 20

• 16

• 14

When the ciliary muscles relax, the thickness of the lens

• increases

• reduces

• remains the same

• sometimes reduces and sometimes increases

A man is suffering from myopia. which of the following statements holds true for him?

• He can correct this defect by using convex lenses.

• He is not able to see the nearby objects clearly.

• This defect can only be treated surgically or through laser.

• He wears spectacles with concave lenses of appropriate focal length.

For us to be able to see an object

• there must be a source of light

• the light must strike the object

• the light must be reflected from the object to the eye

• all of these

It is a bundle of nerves beginning from the brain and entering the eyeball from behind.

• Sclera

• Iris

• Optic nerve

• Ciliary muscles

A _________ can split white light or it can recombine seven colours to form ___________ light.

• Spectrum, VIBGYOR

• VIBGYOR, prism

• White, Prism

• Prism, white

The least distance at which a normal eye can see an object clearly is called the ______________

• Near point of eye

• Far point of eye

• Accommodation of eye

• Persistence of vision