Across
- 3. the type of electromagnetic radiation with the longest wave length
- 5. describes objects that give off their own visible light (e.g. fire)
- 8. the opening in your eye that allows light to get in
- 10. _______ radiation that can cause sunburn but it is also needed by people so they can create Vitamin D (needed for strong bones)
- 11. the coloured part of your eye. It is a muscle that controls the size of your pupil
- 12. the transfer of energy away from a source in the form of waves or particles
- 14. when light bounces back off a material that it hits
- 15. the layer of cells at the back of the eye that senses light
- 16. The ____ is the main source of electromagnetic radiation for the earth
Down
- 1. the angle of incidence is _______ to the angle of relflection
- 2. the form of electromagnetic radiation that is detected by our eyes
- 4. describes objects that can only be seen when light if reflected off their surface (e.g. the moon)
- 6. nerve the part of the eye that send the signals to your brain
- 7. A very thin piece of glass that used to transmit light waves using total internal reflection. they can allow doctors to see inside their patients during surgery
- 9. the part of the eye that focuses light so that it falls on the back of the retina
- 13. the separation of white light into colours (ROY G BIV)
- 14. the bending of light when it passes from one medium to another (e.g. water to air)