Page 128 - Genius Kidz Prudence Learning Sc-8

(b) A car surface produces _______________ reflection

(i) diffused (ii) irregular (iii) regular (iv) both (a) and (c)
(c) Ði=Ðr is
(i) Always true (ii) Not true in case of rough surface

(iii) True in some cases only (iv) None of the above.

2. Fill in the blanks.
1. Image of the object persists on the retina of the eye for _______________ of a second.
2. _______________ change the size of the convex lens.

3. Multiple reflections can generate _______________ .
4. Lateral inversion is _______________ .

3. Match the column.
Column A Column B

(a) Retina (i) Real image
(b) Greased surface (ii) Eye defect

(c) Pupil (iii) Control the amount of light entering the eye
(d) Cataract (iv) Regular reflection
(e) Road (v) Irregular reflection

4. Mark the statements as True/False.

(a) Myopia is near-sightedness.
(b) Cataract can be corrected by surgery.
(c) Ði ¹ Ðr

(d) We can see in a completely dark room if our eyes are functioning.

5. Try and visit an eye specialist and investigate about the diet plan, exercises, etc. to keep your
eyes healthy. Submit a project report on the same.

6. Very short answer type questions.
(a) What is myopia?

(b) What enables us to see ?
7. Short answer type questions.

(a) Write down the two laws of reflection?
(b) Write down one common application of multiple reflections

8. Long answer type questions.

1. What is a Kaleidoscope ? Describe its construction of working.
2. Explain human eye in detail with the help of a Labelled diagram.

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