Light Flashcards
Are moon, water, mirror light sources?
No. These items are not light sources, instead they are reflecting light from other sources
How does light travel?
Light travels in straight lines
When it hits an object, some light is absorbed and the rest reflects off
Opaque
When it hits an object, light rays pass through it easily
Transparent
If the object hits an object, some light can pass through, but the rest of the light will be reflected
Translucent
The angle that a ray of light, meeting a surface makes with a normal to the surface at the point of incidence
Angle of incidence
A line perpendicular to the surface at the point of incidence and reflection
Normal
The angle that a ray of light, reflected from a surface makes with a normal to the surface at the point of reflection
Angle of reflection
The angle of reflection is always equal to the…
Angle of incidence
If the light source is moved closer to the object…
More light is blocked and a larger shadow is formed
Looking north, the sun appears to rise in the…
East to west
It is able to tell us the time
Sundial
Light coming from or reflecting off, object enters the – through the – then the –
Eye, cornea, pupil
It is focused clearly by the lens on to the…
Retina
Nerve in the eye
Optic nerve
