Light Waves
2 marks · NormalDescribe one difference between a luminous object and a non-luminous object. Give an example of each.
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A luminous object gives out its own light, like the Sun. A non-luminous object reflects light from other sources, like the Moon.
Also accept: A luminous object emits light; example: light bulb. Non-luminous object does not emit light, only reflects it; example: book.
Common mistakes: Mixing up examples
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Marking points
B1 · 1 mark · Explains difference between luminous and non-luminous.
B2 · 1 mark · Gives a correct example of each type.
Worked solution
A luminous object produces its own light (e.g., Sun, light bulb). A non-luminous object does not emit light but can be seen because it reflects light from a luminous source (e.g., book, Moon).