grade 8-light-revision(1)

At what angle will the reflected ray strike the second mirror?

• 30

• 45

• 60

• 90

An image that you can see , but does not really exist is called which of the following

• Real Image

• Fake Image

• Virtual Image

• Digital Image

It is the bending of light rays as it travels from one medium to another medium of different densities?

• a. Reflection

• b. Refraction

• c.Dispersion

• d. Diffusion

Front bulged part of the eyeball is called

• Cornea

• Pupil

• Lens

• Blind spot

June and Gabriel are standing in front of a plane mirror. June is 5 m form the mirror and Gabriel is 4 m from the mirror. What is the distance between June and the image of Gabriel?

• 9 m

• 4 m

• 5 m

• 14 m

Which of the following best describes the image formed by a plane mirror?

• virtual, inverted and enlarged

• real, inverted and reduced

• virtual, upright and the same size as object

• real, upright and the same size as object

What makes it possible to see an object when looking through a periscope?

• It contains mirrors that reflect the light coming from the object.

• It magnifies small objects so they can be seen clearly.

• It absorbs the light rays passing through it.

• It separates the light into different colors.

what is the nature of the image of an object formed on the retina of human eye?

• Virtual and erect

• virtual and inverted

• real and erect

• real and inverted

Nocturnal animals will be having

• Large Cornea

• Large Pupil

• Retina with large number of rods

• All of the above

A series of fast moving still pictures can create an illusion of movement. Why?

• The eye can focus on very rapidly changing pictures

• The eye is quicker than the brain

• Persistence of vision

• None of the above