Question

4
Taj Sun
Which of the following is/are not always necessary to observe a shadow?
(b) Screen
5.
8.
Sta
F.
1.
2.
3
5.
6.
G. M
1.
2.
3
4.
1
2.
H. W
1.
2.
shadow?
(a) The shape of the shadow of the tree changes but the size remains the same.
(b) The size of the shadow of the tree changes but the shape remains the same.
(c) Both the size and shape of the shadow of the tree change.
(d) Neither the shape nor the size of the shadow changes.
B. Very Short Answer Type Questions
1.
Name the type of object that does not give out its own light.
2. Give the names of four different sources of light.
3. Name three man-made sources of light.
4. Name the type of object that allows only a part of the light falling on it to pass throug
5. Are stars luminous or non-luminous?
C. Short Answer Type Questions
What are luminous and non-luminous objects? Give two examples of each.
How are shadow produced?
3. Classify the following as transparent, translucent, or opaque :
clean water, brown paper, waxed paper, an aluminium plate, a thin muslin cloth
plastic ruler, wood, skin, a slone, dense smokes, a heap of salt, spectacles, blood and
4. What are the conditions required for a shadow to be formed?
5. Distinguish between an image and a shadow.
D. Long Answer Type Questions
What is the difference between opaque, transparent and translucent substances?
2. Does light travel in a straight line? Describe an experiment in support of your answer.
3. How is the shape and size of shadow affected, if coloured light is used instead of wh
light.
4. What do you understand by the term reflection of light? Name two objects which
reflect light.
Fill in the blanks from the list of words given below.
Luminous, straight, shadows, reflection, transparent, opaque, translucent, natural
1. Objects like the sun that gives out or emits light of their own are called
object.
2. Light travels in a
line.
3. Stars are
sources of light.
1.
L
1
1.
E.
(c) Source of light (d) Opaque objeci
Pahell observed the shadow of a tree at 8.00 a.m., 12:00 noon and 3:00 noon pm
of the following statements is closest to her observations about the shape and size​

Answer 1

Answer:

Please mention the question properly