Question

Fill in the blanks :

1. The point at which the incident ray falls on the mirror is called ___________________

2. If a ray of light is incident on a plane mirror at an angle of 300

, its angle of reflection is

_______________.

3. If a ray of light is incident normally on a mirror, i = __________ and r =

________________

4. The image of our face in a plane mirror is an example of ___________ image.

5. The distance of the image behind the plane mirror is _________ to the distance of the

object in front of it.

6. The principle of ___________is made use of in motion picture projection in

cinematography.

7. The presence of __________________ cells on the retina helps us to see in dim light.

8. The coned shaped cells of our retina respond to _____________

9. Due to the absence or insufficient number of ____________ cells a person becomes

colour blind.

10. Owls and bats are able to see at night due to the presence of ______________ cells in

their retina.
11. The thin, saline liquid that fills the anterior part of the eye is _________.

12. ___________ is the jelly like fluid found in the posterior part of the eye.

13. In a spectrum formed by a prism ______ colour deviates the least and ____________

colour deviates the most.




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Answer 1

Answer:

1- the point of incidence

2- incident ray

3- 0°

4- virtual image

5- the image is the same distance behind the mirror as the object is in front of the mirror.

6- Persistence of vision

7- rod cells

8- color vision

9- cone cells

10- rod cells

11- aqueous humor

12- vitreous humor or vitreous gel.

13- red colour deviates the least and violet colour deviates the most.