Remedial Assignment – 1
1. The ability of the eye lens to adjust its focal length is called ………………………
2. A person is not able to see far away objects distinctly but can read a newspaper. The person is suffering from ………………………….
3. A child is not able to read newspaper but can see far away things. The child is suffering from ………………………….
4. An old person is not able to see far away objects as well as nearby objects. The person is suffering from …………………………..
5. Near point of normal eye is ………………….. and far point of normal eye is ……………………
Remedial Assignment – 2
1. The causes of myopia are:
(a) Elongation of …………………………….
(b) ……………….. curvature of ……………………
2. Myopia is corrected by using a ………………………… Lens.
3. Near point of myopic eye is …………………. and far point of myopic eye is …………………….
4. Draw a diagram to show a myopic eye.
5. Draw a diagram to show correction of myopic eye.
Remedial Assignment – 3
1. The causes of hypermetropia are:
(a) Long ……………………………………….
(b) shortening of………………..…………………
2. Hypermetropia is corrected by using a ………………………… Lens.
3. Near point of hypermetropic eye is …………………. and far point of hypermetropic eye is …………………….
4. Draw a diagram to show a hypermetropic eye.
5. Draw a diagram to show correction of hypermetropic eye.
Remedial Assignment – 4
1. The causes of presbyopia are:
(a) Weakening ………………………………………
(b) diminishing ……………………………………….
2. Presbyopia is corrected by using a ……………………….. lens.
3. The upper part of bifocal lens is ………………………………… to correct long vision.
4. The lower part of bifocal lens is …………………………… to correct ……………………
5. The power of ………………………… of eye usually decreases with ageing.
Remedial Assignment – 5
1. Define refractive index.
2. Define absolute refractive index.
3. State Snell’s law.
4. Define power of a lens.
5. Define one dioptre.
6. Refractive index of water is 1.33 and refractive index of glass is 1.5. In which medium light travels the fastest?
Remedial Assignment – 6
1. Draw a ray diagram to show the formation of same sized image by a concave mirror.
2. Draw a ray diagram to show the path of light through a glass slab.
3. Draw a ray diagram to show the formation of image of rear traffic by a rear view mirror. consider the vehicles are at a finite distance from the mirror.
4. What is the relation between focal length and radius of curvature of a spherical mirror.
5. Write mirror’s formula.
6. Write lens formula.
