WorksheetsLý 7
Total questions: 10
Worksheet time: 7mins
Question 1: Which of the following phenomena is not related to light energy?
Sunlight reflects on water
Sunlight burns the skin
Solar cookers heat up thanks to sunlight
Sunlight is used to generate electricity
Question 2: Which of the following statements is false?
The Sun is the main source of light energy and heat energy on Earth
Light energy is needed for plant growth
Light has no energy because it exerts no force
Light energy can be converted into heat
Which of the following statements is correct?
Light rays are curves
Light rays are always parallel
Light rays tell us how fast or slow light travels
The path of light is represented by a straight line with an arrow indicating the direction of light propagation called a light ray
Fill in the blanks: Parallel light beams include light rays……………… on their paths.
Intersecting
Non-intersecting
Flared
Which of the following pictures represents a converging beam?
a
b
c
d
What is the dark area?
It is an area that completely does not receive light from the incoming light source
It is an area that only receives part of the light from the incoming light source
It is the area that completely receives light from the incoming light source
It is the area in front of the obstacle and receives light
Choose the incorrect statement. What is an object that blocks light?
Does not allow light to pass through
Placed before the observer's eyes
Block the path of light
Supports light transmission
Light is a form of (a)
What is an opaque object?
Glass
Book
Plastic wrap
towel
The penumbra is the area behind the obstacle, completely receiving no (a) from the incoming light source.
