Physics Yr.7

Question 1

Plane mirror

Answer 1

A plane mirror is a mirror that reflects light perfectly

Question 2

Specular reflection

Answer 2

This is when the reflection is perfectly done. e.g. a ray is shone at a plane mirror at 45degrees it will be reflected at 45 degrees.

Question 3

Diffuse scattering

Answer 3

This is when light rays are shone on a normal object, the object will then reflect it all over the place.

Question 4

Law of reflection

Answer 4

The law of reflection is when the incident ray and the reflected ray are at the same angle.

Question 5

Incident Ray

Answer 5

The incident ray is the ray that will be reflected but is shone at the mirror

Question 6

Reflected Ray

Answer 6

The reflected ray the incident ray after it has bounced off the mirror.

Question 7

Refrection

Answer 7

Refraction is when a light ray bends due to the change in medium.e.g. Light is traveling in air but then has to travel through glass.

Question 8

Angle of refraction

Answer 8

The angle of refraction the the angle in between the refracted ray and the normal.

Question 9

Medium

Answer 9

The medium is what light or sound waves travel on, however the light ray doesn’t have to but the sound wave does.

Question 10

Cornea

Answer 10

The cornea is the protective lens that sits in front of the pupil

Question 11

Lens

Answer 11

The lens refracts the light onto the retina which makes an image.

Question 12

Retina

Answer 12

The retina is the back of the eye that makes an image