Science 8 · Unit 6: Light · Cambridge Lower Secondary Science Stage 8

Questions

1. 1. What are primary colours of light?

   • the first colours in a rainbow
   • the brightest colours
   • colours that cannot be made by adding other colours
   • colours made by mixing any others
   Check

2. 2. What are the primary colours of light?

   • red, green and blue
   • orange, green and violet
   • red, yellow and blue
   • white, black and grey
   Check

3. 3. What does red light added to green light make?

   • cyan
   • brown
   • magenta
   • yellow
   Check

4. 4. What does green light added to blue light make?

   • purple
   • magenta
   • yellow
   • cyan
   Check

5. 5. What does red light added to blue light make?

   • green
   • yellow
   • cyan
   • magenta
   Check

6. 6. What do red, green and blue light make together?

   • brown light
   • grey light
   • black light
   • white light
   Check

7. 7. Why does sunlight appear white?

   • It is a mixture of all seven colours.
   • It contains no colours.
   • Air makes it white.
   • The Sun is white-hot only.
   Check

8. 8. White light shines on a red filter. What comes through?

   • green light
   • no light
   • red light
   • white light
   Check

9. 9. What happens to green light at a red filter?

   • It is reflected back as red.
   • It is transmitted.
   • It turns red.
   • It is absorbed.
   Check

10. 10. Light through a blue filter then shines on a green filter. What comes out?

    • no light
    • cyan light
    • green light
    • blue light
    Check

11. 11. A green T-shirt looks green in white light. Why?

    • It transmits all light.
    • It absorbs green light.
    • It reflects only green light and absorbs the other colours.
    • It makes green light.
    Check

12. 12. How does a green T-shirt look in red light?

    • yellow
    • green
    • red
    • black
    Check

13. 13. Which colour of light makes white paper look blue?

    • blue light
    • yellow light
    • green light
    • red light
    Check

14. 14. How can a green apple be made to look black?

    • shine green light on it
    • shine white light on it
    • shine yellow light on it
    • shine red or blue light on it
    Check

15. 15. How can white lamps produce yellow light in a sign?

    • by using a blue filter
    • by using a mirror
    • by painting the lamps black
    • by shining through a yellow filter
    Check

16. 16. Why is black not considered a colour of light?

    • Black is the absence of light.
    • Black is very bright.
    • Black is all colours mixed.
    • Black is a primary colour.
    Check

17. 17. Traffic lights use three identical white lamps. How do they make red, yellow and green light?

    • Each lamp is painted a different colour.
    • They use mirrors to split the light.
    • The lamps get hotter to change colour.
    • Each lamp has a coloured filter in front of it.
    Check

18. 18. A red cube is seen in green light. What colour does it look?

    • green
    • yellow
    • red
    • black
    Check

19. 19. A white T-shirt is seen in blue light. What colour does it look?

    • black
    • green
    • blue
    • white
    Check

20. 20. White light shines through a green filter, then through a red filter. What comes out?

    • green light
    • red light
    • no light
    • yellow light
    Check