SP3b Refraction

Question 1

Incident ray?

Answer 1

light ray in first medium, travelling towards the boundary.

Question 2

Refracted ray?

Answer 2

light ray in second medium, travelling away from the boundary.

Question 3

Normal?

Answer 3

imaginary line perpendicular to the boundary.

Question 4

Angle of incidence?

Answer 4

angle between the normal and the incident ray.

Question 5

Angle of refraction?

Answer 5

angle between the normal and the refracted ray.

Question 6

What happens when light enters a more optically dense medium (such as glass)?

Answer 6

it travels slower, and causes the direction of the light to change.​

Question 7

When light slows down, which way does it bend to the normal?

Answer 7

towards the normal.

Question 8

When light speeds up, which way does it bend to the normal?

Answer 8

away from the normal.

Question 9

What happens when light travels at 90degrees?

Answer 9

there is no change in direction.

Question 10

What is white light made up of?

Answer 10

all the wavelengths of the visible spectrum.

Question 11

What causes colours to split?

Answer 11

difference in speed/wavelength.

Question 12

Reflect?

Answer 12

Wave bounces off, staying in the first medium.

Question 13

Refract?

Answer 13

Wave passes from one medium to another and changes direction due to speed changes.

Question 14

Transmit?

Answer 14

Wave passes through from one medium to another and is not absorbed or reflected.

Question 15

Absorb?

Answer 15

Wave disappears as the energy it is carrying is transferred to the second medium.

Question 16

Angle of reflection?

Answer 16

angle between the normal and the ray of light that has been reflected.