LIGHT SHADOW AND REFLECTION

 CLASS 6

I. Multiple Choice Questions carrying one mark each–

(1) Plane mirrors are used in:
(a) solar cookers	(b) kaleidoscope
(c) looking glasses	(d) All of these

(2) If you stand before a plane mirror and look at your image, your right ear will appear as:

(a) Right ear of your image	(b) left ear of your image
(c) inverted	(d) none of these
(3) shadows cannot be formed:
(a) during noon time	(b) in the dark
(c) during morning time	(d) all of these
(4) An example of a translucent object is:
(a) frosted glass	(b) wood	(c) glass	(d) paper
(5) An example of a luminous object is:
(a) sun	(b) moon
(c) fire fly	(d) both (a) and (c)

2. Match the following carrying one mark each:

(1)	Opaque object	(a) Glass
(2)	Transparent object	(b) Star
(3) Non‐luminous body		(c) Greased paper
(4) luminous body		(d) Moon
(5) Translucent object		(e) Wall

3.Write True (T) or False (F) carrying one mark each:

(a)A number of parallel rays are called divergent.

(b)The type of shadow formed does not depend on the size of the object.

(c)When you walk in the sun your shadow also moves along with you.

(d)An opaque object absorbs all light that falls on it.

(e)The speed of light in water is much more than that in air.

4.Fill in the blanks carrying one mark each:

(a)Images formed by a plane mirror are always …………………..and …………….. .

(b)Shadows are always ………………….. in colour.

(c)Light travels in a ………………….. line.

(d)………………. Is the ultimate sourse of light energy on earth.

5.Answer in one line only carrying two marks each:

1.What happens when light strikes a transparent body like glass?

2.What happens when light falls on a mirror?

3.What is ‘reflection of light’?

4.Define object.

5.Define lateral inversion.

6.What are divergent rays?

7.What are convergent rays?

8.When does a lunar eclipse occur?

9.What is a ‘reflector’?

10.List the Characteristics of image formed by a plane mirror.

11.Which part of the shadow is completely dark and why?

12.‘Without sunlight, life would be impossible’. Give reasons.

13.List two important characteristics of a shadow.

14.What is a ‘pinhole camera’? How can it be used?

15.What is mirror reflection? Give examples.

6.Answer in two or three lines only carrying three marks each:

(1)Distinguish between image and shadow.

(2)Distinguish between transparent and opaque objects.

(3)Write three uses of plane mirror.

(4)What does a pin‐hole camera demonstrate? On what principle does it work?