Chapter 39 - Light Flashcards
1
Q
Give examples of light as a form of energy
A
- Photosynthesis- light to chemical
* Solar cells- Light to electric
2
Q
What is the speed of light?
A
300,000,000 metres in one second!
3
Q
Why are shadows formed?
A
- Light travels in straight lines
2. Light cannot pass through certain materials, such as opaque materials
4
Q
What are luminous objects?
A
Objects that make and give out their own light E.g: sun candle light bulb
5
Q
What are non luminous objects?
A
Objects that reflect light from another source. E.g the only reason you can see a ball is because it reflects light onto your retina
6
Q
Dispersion
A
The separating of light into its different colours
7
Q
Reflection
A
Light bouncing off objects
8
Q
Refraction
A
Bending of light as it passes from one medium to another
9
Q
Does light travel in straight lines?
A
Yes
