Unit c review
- 1. Mr.Ilko
- 2. Concave lens – a sunken in piece of glass that causes light to spread out when light passes through it Convex Lens – a bulged piece of glass that causes light to bend to a focal point when passed through it Concave mirror – a sunken in piece of glass that bounces light into a focal point Convex mirror – a bulged out piece of glass that bounces light away from its original path Focal point only happen on concave mirrors and convex lenses in reality, the other two have imaginary focal points
- 3. ACRONYMN --- SERB S – Straight – light travels in straight lines E – Energy – Light is a form of energy R – Reflected – light can be reflected B – Bent – Light can be bent
- 4. Luminous – light (how bright it is) Transparent – Almost all of the light is able to get through Translucent – Some light is able to get through and a small shadow is created Opaque– no light is able to get through, and a shadow is cast
- 5. RegularReflection – when the ray of light hits off a smooth surface and bounces off at the same angle it came in at Ex. Jacket reflectors DiffuseReflection – When light hits off a rough surface and is scattered on random directions and different angles Clothing around reflector tape
- 6. LaserEyes surgery – reshapes the cornea of the eye Compound eye – Usually on insects…eye is broken up into individual parts called ommatidium Camera eye – Human eye that is round, has a cornea, retina and pupil
- 7. Rods – High sensitivity to light Cones – Colour detectors Humans see in RED, GREEN, BLUE --- NOTHING ELSE!!!!! In TV’s we see a colour like yellow by red and green rods being close together
- 8. Amplitude – The height of the Crest from the resting point Wavelength – distance from the beginning of a wave to the end Frequency – How often a wave length occurs in a given time frame
- 9. The ability for animals to produce their own light Usually happens due to a chemical reaction or bacteria
- 10. Fluorescent – Uses electricity passing through a gas in order to spark and create light Incandescent– Uses a heated up metal coil in order to produce light Phosphorescent – Uses UV light on a phosphor coating to produce light
- 11. 7 Ranges Radio Waves Microwaves Infrared waves Visible Spectrum -- ROYGBIV Ultra-violet waves X-Rays Gamma Rays
- 12. Iris Pupil Retina Lens Cornea