Light

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Light
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Q1. What enters the eye to let us see colours?
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A1. Light
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Q2. Name a valuable, extremely hard,
colourless gemstone
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A2. Diamond
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Q3. What are lenses, windows and prisms usually
made of?
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A3. Glass
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Q4. What do we call something that can be seen
through clearly?
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A4. Transparent
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Q5. What do we call something that lets light
through but does not let us see clearly?
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A5. Translucent
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Q6. What do we call something that does not
transmit light?
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A6. Opaque
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Q7. Where on an object is the light absorbed or
reflected?
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A7. The surface
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Q8. Give a word that means a picture formed by
light.
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A8. Image
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Q9. What do you see in a mirror?
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A9. A reflection
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Q10. What do we call the bending of light when it
passes from air to water?
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A10. Refraction
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Q11. What do we call the line at right angles to
a surface or interface?
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A11. The normal
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Q12. What is the scientific term for the
incoming light ray?
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A12. The incident ray
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Q13. Name the main optical component in
spectacles(glasses) and telescopes
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A13. A lens
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Q14. Which colour surface reflects all incident
light equally?
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A14. White
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Q15. Which colour surface absorbs all incident
light?
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A15. Black
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Q16. What is the scientific term for the colours
of the rainbow?
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A16. Spectrum
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