Light
Light always travels in ? lines
Straight
What is the law of reflection?
Angle of incidence = Angle of Reflection
Light refracts when it passes from a ? substance to a ? substance
Less dense -> more dense
More dense -> less dense
The hole in the front of the eye
Pupil
What happens to the image in a pinhole camera?
It flips
What is the speed of light?
300,000,000m/s
300,000km/s
What are the two types of reflection?
Specular and diffuse
Define refraction
The apparent bending of light
The transparent covering at the front of the eye
Cornea
Digital cameras process images by light hitting a ?
Sensor
Light ? require particles to travel
Doesn't
If an object is not completely smooth, what type of reflection will it have?
Diffuse
When light enters a glass block, it bends ? the normal line
Towards
The thing that focusses light
Lens
Pinhole cameras work by letting only ? ray of light through
One
How many minutes does it take light to reach Earth from the Sun?
8
What is a line at 90o to a reflective material called?
As light travels through a different medium, it will change ?
Speed
The part of the eye that changes the size of the pupil
Iris
What are the two types of lens?
Convex and Concave
What is the definition for a wave?
A transfer of energy from one place to another without transferring matter
What sort of diagram can be used to represent reflection?
Ray diagram
Angle of light ray in ? Angle of the light ray out
Equals/=
The light sensitive area at the back of the eye
Retina
Why is the image produced upside down and crossed over?
The light rays cross over inside the camera