Light
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (16 张)
The light from the sun………. Off and object and into our eye
Reflects
How fast does light travel?
300,000,000 m/s
How fast does sunlight take to reach earth?
8.3 minutes
Light travels in?
Straight lines
The law of reflection is…
Angle of incidence = angle of reflection
In a basic mirror, our image is…
Laterly inverted, the right way up, the same size, virtual, behind the mirror.
A tiny upside down image forms in….
The retina
It changes light energy into electrical signals called……
Impulses
Impulses travel to the brain through the….
Optic nerve
Light waves change speed when passing between the boundry of 2 substances with different….
Density
When passing between two boundaries it causes the light waves to change direction. An effect called…..
Refraction
When light hits the glass block it slows down and….
Bends towards the normal line.
The rainbow is in order of…
Lowest to highest frequency.
Red and green
Black
Filters absorb what?
All colours but the one which is the same as itself.
How far away is the sun?
15,000,000 km