"Physics 2": HTML5 Crossword

Across

2. When light is blocked by an opaque object, a _____ is formed. (6)
4. _____ colours are basic colours which cannot be obtained by mixing other colours together, for example, red, green and blue. (7)
10. The bouncing of light rays off a surface is called _____. (10)
11. An _____ object does not allow light to pass through it. (6)
12. When a beam of white light travels through a prism, it is split into a _____ of seven colours. (8)
13. A _____ image cannot be captured on a screen. (7)
14. Dentist uses a _____ mirror to have an enlarged view of our teeth. (7)
15. _____ colours are formed by mixing primary colours, for example, cyan, magenta and yellow. (9)
16. Refraction occurs because light changes its _____ as it travels from one medium to another. (5)
17. A _____ consists of a tube in which two plane mirrors are set up at 45° to the horizontal. It is used to see objects at elevated level. (9)
18. The SI unit of current is _____. (6)
19. If the light rays are reflected off a rough surface, _____ reflection occurs. No image is formed. (8)

Down

1. The anchor of a ship prevents the shop from drifting. It sinks in seawater because it has _____ density than seawater. (6)
3. The splitting of white light as it passes through a prism is called _____. (10)
5. If the light rays are reflected off a smooth surface, _____ reflection occurs. A clear image is formed. (7)
6. An electric _____ is the rate of flow of electric charges. (7)
7. The bending of light as it travels from one medium to another of a different density is known as _____. (10)
8. The _____ _____ flows from the positive terminal of a battery to the negative terminal. (12,7)
9. _____ mirror is used in a dance studio for dancers to check if their dance moves are correct. (5)
14. In a shop, people use a _____ mirror as surveillance mirror as it provides wider field of view. (6)