PROPERTIES OF LIGHT

MONDAY 23 AUGUST 2021

PdPR SCIENCE YEAR 4 DLP

TIME : 8.30 am – 10.00 am

THEME : PHYSICAL SCIENCE

TOPIC : 5. PROPERTIES OF LIGHT

( REVISION : MIND TEST )

ANSWERS FOR LAST WEEK’S ASSIGNMENT.

1

ANSWERS
1. The function of the mirror is to reflect the light while the water is

to refract the light.
2. When the light from the sun shines on the rain droplets, the light

will be refracted and form a rainbow.
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ANSWERS FOR MIND TEST ( page 109 and 110 – Science text book)

ANSWER:

i) in a straight line
ii) reflected / refracted
iii) refracted / reflected

ANSWER:

Light travels in a straight line.

2

ANSWER: (a) √

ANSWERS: – Clear
(a)
Opaque

Transparent – None

Translucent – Less clear

3

b) An opaque object forms a clearer shadow in
comparison to a translucent object. /
An opaque object forms a clearer shadow than a
translucent object.
OR
A translucent object forms a less clear shadow than an
opaque object./
A translucent object forms a less clear shadow in
comparison to an opaque object.

ANSWERS:
i) The orientation of the object.
ii) The position of the light source.

ANSWERS:
i) The distance between the object and the light source.
ii) The distance between the object and the screen.

4

ANSWER:
Decrease the distance between the light source and the
object.
OR
Move the light source towards the object.

ANSWER:
When the distance between the light source and object
increases, the size of shadow decreases.
OR
If the distance between the light source and object
increases, the size of shadow decreases.
OR
The more the distance between the light source and
object, the less the size of shadow.
OR
The longer the distance between the light source and
object, the smaller the size of shadow.

5

ANSWERS:
i) The distance between the light source and object.
ii) - The size of object. /

- The distance between the object and the screen.
iii) The size of shadow

ANSWERS:
- Property of light applied : Light can be reflected /

Reflection of light
- Its function : Allow us to see objects that are blocked

from our view.
9. Complete the picture below in the form of a ray diagram.

6

ANSWER:
When the Sun shines on the rain droplets, the light is
refracted and a rainbow is formed.
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