1. A virtual image is formed if the object is located less than focal length from the concave mirror.

True

False

None of the above

Can't say

2. Angles measured clockwise from the optic axis are negative.

True

False

None of the above

Can't say

3. The amount of bending of the path of light in refraction, depends on the power of the two media.

True

False

None of the above

Can't say

4. A diverging lens is a lens which diverges rays of light which are travelling parallel to its principal axis.

True

False

None of the above

Can't say

5. The speed of the wave depends upon the optical density of that material.

True

False

None of the above

Can't say

6. The crystalline lens is enclosed in a highly elastic (flexible) capsule.

True

False

None of the above

Can't say

7. The eye is much optically inferior than the camera.

True

False

None of the above

Can't say

8. The individual components of the eye work in a manner similar to a camera.

True

False

None of the above

Can't say

9. Optic disc is responsible for color vision.

True

False

None of the above

Can't say

10. The choroid also has a high concentration of a pigment called melanin in its cells.

True

False

None of the above

Can't say

11. The ratio of the image dimensions to the object dimensions is termed the magnification.

True

False

None of the above

Can't say

12. The light ray approaching the mirror is known as reflected ray.

True

False

None of the above

Can't say

13. Wavelengths visible to the eye never pass through the optical window.

True

False

None of the above

Can't say

14. A double convex lens is symmetrical across both its horizontal and vertical axis.

True

False

None of the above

Can't say

15. There are eight extra ocular muscles, which controls the eye movement.

True

False

None of the above

Can't say

16. The eye is able to detect bright light or dim light.

True

False

None of the above

Can't say

17. Focal length is denoted by

f

F

d

D

18. The speed of the wave depends upon the

Optical density

Thickness

Velocity

Thinness

19. Least dense material is

Vacuum

Air

Glass

Plastic (CR39)

20. Index of refraction values, represented by the symbol is

n

v

t

m

21. Which of the following is relevant to cornea?

Opaque

Transparent

Translucent

None of the above

22. The distance from the vertex to the center of curvature is known as the

Radius of curvature

Center of curvature

Focal point

None of the above

23. Objects which are capable of reflecting light to our eyes are:

Solid objects

Illuminated objects

Non-illuminated objects

None of the above

24. The retina contains two types of photoreceptors

Rods and cones

Macula and fovea

Optic nerve and optic disc

None of the above

25. The optical system of the eye consists of

Cornea

Aqueous humor

Crystalline lens

All of the above

26. Which gland provides large amount of tears?

Zeiss

Moll

Lacrimal

All of the above

27. A typical human eye will respond to wavelengths in air from about:

380 to 750 nm

750 to 850 run

850 to 950 nm

950 to 1000 nm

28. High resolution color imaging is provided by light sensor cells called:

Cones

Rods

Both and

None of the above

29. Outer side of the sphere is silvered in:

Concave mirrors

Convex mirrors

Both and

None of the above

30. The visual axis directly straight cut the:

Fovea

Retina

Optic disc

Choroid