Question

d. ray
Ch Light, Shadow and Reflection
1. When an object is placed in front of a plane mirror,
then the right side of an object appears to become left
side of image and left side of an object appears to
become the right side of image.
a reflection of light
b. lateral inversion
both a and b
d. neither a norb
2. Which of the following is an opaque material?
a clear water
b. butter paper
e plastic sonle
d. rubber
3. Which of the following gives us dark shadow on the
screen when light falls on it?
a opaque material b. transparent material
c translucent material d. all of these
4. A lunar eclipse occurs when
a the Earth is between the sun and the moon
by the moon is between the sun and the Earth
c the sun is between the earth and the moon
d. in all the above situations.
5. The image produced in a pinhole camera is
a inverted
b of the same size of the object
c. Both a and b
d. neither a norb
6. A mirror is an example of
a luminous object
b. reflecting object
c. translucent object
d. none of these
Which of the following is incorrect?
#light enables us to see different objects.
b. light itself is invisible.
c light enables us to see the colours of nature.
d. Bght has no natural source.
8. Which of the following is non-luminous object?
Sun
b. Candle
e oil lamp
d. Water
9. We can see only those objects which lie in the path of
light due to
a reflection of light
b rectilinear propagation of light
e dispersion of light
J conversion of light
10. Shadow formed by sunlight is longest
ant noon
b. at night
c. in the morning
d. none of these
11. The position of the shadow shifts as the
4 position of the source shifts
b position of the object shifts
position of screen shifts
d both a and b
12. Reflection of light occurs well surfaces are
#shiny and opaque brough and opaque
e shine and transparent drough and transparent
13. Very light or no shadow is formed in case of
á a translucent object b. a transparent object
can opaque object d. both a and be
14. The object does not east a shadow when
a surface of an object is rough
b. light shines on an object from above
c. an object is opaque
d. none of these
15. The paint behind a mirror
a reflects the light incident on it
b protects the plass of the inirror
cstops transmission of light through the mirror
d. makes mirror attractive
16. Trees covered with a large number of leaves are
natural
a plane mirrors
b. pinhole cameras
e both a and b
d neither a norb
17. An opaque, smooth , bighly polished surface, typically
made of glass coated with a metal amalgam , which
reflects a clear image is
a pinhole camera
b. mirror
c. translucent surface
d. none of these
18. The optical, coloured appearance with every detail of
the object produced on a polished surface when light
from an object is reflected, is
a. shadow
b. light
c. image
19. Which of the following is an example of rectilinear
propagation of light?
a rainbow in the sky
b. shining moon
e formation of shadow
d rising of the sun
20. A plane sheet of glass placed in the path of light will
result in the formation of
a. a shadow
b. an image
c. both a and b
d. none of these
21. The partially shaded, outer region of the shadow cast
by an opaque object is
a umbra
b. penumbra
c. both a and b
d. neither a por b
22. Umbra is the
a fully shaded region
b inner region of the shadow cast by an opaque object
c. outer region of the shadow cast by an opaque object
d. both a and b
23. Penumbra is dark because light from the
light sources reaches it.
a very: most of
b. less : most of
e very some
d. less some
24. If the light source is small and pointed, then
a the shadow will be partial but dark
b. the shadow will be complete and very dark
c the shadow will be complete but not dark
d. none of these
25. What kind of source form (s) penumbra?
a. only small and pointed source
b only extended or wide source
c. both small and extended sources
d. none of these​

Answer 1

Answer:

first one is option b.....

Answer 2

Answer:

1 a

2 d

3 b

4 c

5 d

6 b

7 a

8 b

9 c

10 a

11 a

12 c

13 d

14 b

15 b

16 a

17 b

18 d

19 c

20 a

21 b

22c

23 d

24 a

25 b

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