Across
- 2. The point where the rays meet.
- 3. ... objects emit more infrared radiation.
- 6. A use of microwaves.
- 7. Another name for a concave lens.
- 8. Light is an example of a .... wave
- 10. Another name for a convex lens.
- 11. As light enters a less dense medium, it travels ....
- 15. A use of ultraviolet radiation.
- 17. Another name of oscillations.
- 19. The seismic wave that is longitudinal.
- 20. The most ionising electromagnetic wave.
- 21. Radio and microwaves can be used for communication because of their long ....
- 24. The only electromagnetic wave that can be seen.
- 26. Xrays cannot be used for prenatal scanning, as it is too ....
- 27. ..., shiny objects are the best reflectors of radiation.
- 29. An image formed infront of the lens.
- 30. The change in direction and speed of light.
- 31. Frequency is proportional to ....
- 33. A perfect ... emits and absorbs the same amount of infrared radiation.
Down
- 1. The distance between the lens and the principal focus.
- 4. When the image is larger than the object.
- 5. An image formed behind the lens.
- 9. As light enters a denser medium, it will bend .... the normal.
- 12. S waves can only travel through ....
- 13. Sound waves require a ... to travel.
- 14. The electromagnetic wave with the longest wavelength.
- 16. In a transverse wave, the direction of oscillations are ... to the direction of energy transfer.
- 18. A use of gamma rays.
- 22. Sound is an example of a ..... wave
- 23. Ionisation can cause ....
- 25. An image that is upside down.
- 28. A use of radio waves.
- 32. The law of reflection states that the angle of incidence is ... to the angle of reflection.