Mirrors do not make their own light. That is why you cannot see a mirror in a completely dark room. The moon is not a source of light because it just reflects light from the Sun. You must not look directly at the Sun because, Sun is a very bright object which can damage your eyes very quickly. Ultraviolet is very powerful light that is given out by the Sun.
UV light can damage your eyes. Ultraviolet also causes severe sunburn and skin cancer. You should always remember to use sunscreen before exposing to the direct sunlight. Sources of light. What are sources of light? Any source or object which emits its own light is a source of light.
Luminous objects Anything that gives off light of its own is said to be luminous. Two groups of sources of light. Natural sources of light Artificial sources of light. Examples of natural sources of light. The Sun. Examples of artificial sources of light. Light bulb. These are called light sources. Write the answers on the board in three unlabelled columns: non-light sources, artificial light sources and natural light sources.
Discuss the difference between the objects on the board — which are natural and which are artificial. Do some of them only reflect light? Hand each student a Light Sources Worksheet and ask them to complete the first question.
Invite your class to discover the brightest light sources in the Universe — stars! Light Sources A light source is anything that makes light, whether natural and artificial. Identify examples of different types of light sources: natural and artificial Understand we see object because light reflects off them into our eyes. Step-by-Step Begin this activity by asking your students to name some objects that create light.
What is the main source of light on Earth? What are the two types of light? Which source of light is brightest? Is moon the source of light? What kind of light comes from the moon? Which planet would you jump the highest on? Which is not natural source of light? What is the difference between natural and artificial sources of light?
Which of the following is a natural living source of light? Can a source of light be cold give example? Can light be produced without heat? Is Firefly cold source of light? Which of the following is a hot source of light? Which of the following is cold source of light? Which is the secondary source of light in a fluorescent lamp? What is luminous object? What is the example of luminous object? How do objects see us? How can we see non-luminous object? Is Diamond a luminous object? What are non luminous objects examples?
Which of the following is non luminous object?
0コメント