Here are 10 one-word answer type questions from the topic Light with their answers and explanations:
Topic: Light
Light is a form of energy that enables us to see objects. It travels in a straight line and can be reflected by shiny surfaces. Mirrors and lenses form images of objects based on the behavior of light.
1. Question: What is the natural source of light for Earth?
Answer: Sun
Explanation: The Sun is the main source of light on Earth and helps us see things during the day.
2. Question: What is the phenomenon called when light changes its direction after hitting a shiny surface?
Answer: Reflection
Explanation: Reflection is the bouncing back of light from a shiny or polished surface.
3. Question: What kind of surface is required for the reflection of light?
Answer: Shiny
Explanation: Light reflects well from polished or shiny surfaces like mirrors and steel plates.
4. Question: What type of image is formed by a plane mirror?
Answer: Virtual
Explanation: The image formed by a plane mirror is virtual, erect, and of the same size as the object.
5. Question: How many colours are there in a rainbow?
Answer: Seven
Explanation: A rainbow is made up of seven colours — red, orange, yellow, green, blue, indigo, and violet.
6. Question: Which lens is thicker at the centre and thinner at the edges?
Answer: Convex
Explanation: A convex lens is thicker at the centre and is used to converge light rays.
7. Question: What is the device called that is used to see magnified images of small objects?
Answer: Magnifying glass
Explanation: A convex lens is used in a magnifying glass to see enlarged images of small objects.
8. Question: What is the term for an image that can be obtained on a screen?
Answer: Real
Explanation: A real image can be obtained on a screen and is usually inverted.
9. Question: What is the term used for the bending of light when it passes through a prism?
Answer: Refraction
Explanation: Refraction is the bending of light when it passes from one medium to another like air to glass.
10. Question: What is the phenomenon called when white light splits into seven colours?
Answer: Dispersion
Explanation: Dispersion is the splitting of white light into seven colours when it passes through a prism.
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