Refraction of light

Question 1

What is the normal?

Answer 1

90 degrees to the surface + doesn’t refract

Question 2

ray of light > water = ?

Answer 2

slows down + refracts

Question 3

ray of light < water = ?

Answer 3

speeds up + refracts

Question 4

Which lens focuses light?

Answer 4

convex

Question 5

Which lens diffracts light into a spectrum of colours?

Answer 5

prism

Question 6

Which lens lens cause light to diverge?

Answer 6

concave

Question 7

What type of material cause light to refract?

Answer 7

transparent

Question 8

Formula for refractive index?

Answer 8

n = c/cs

(c = speed of light)
(cs = velocity of light in material)

Question 9

What is snell’s law?

Answer 9

When ray of light passes from less dense to more dense, speed change ( slow down) & direction bend toward normal

Question 10

Why mirror reflect?

Answer 10

Cuz angle of incidence ig?

Question 11

Light in glass block explanation please?

Answer 11

Material is denser, light slow down and refracts

Question 12

Light in prism explain damn

Answer 12

Blue light refracts more?

Spectrum made and refracts all colours cuz diff wavelengths

Question 13

Look at page 9 cuz i dont get it bro

Answer 13

Okay u loser

Question 14

4 things of multimode optical fibres?

Answer 14

Core
Cladding
Buffer
Jacket

Question 15

What da core?

Answer 15

• glass/plastic with higher index of refraction than cladding
• Carries the signal

Question 16

What cladding?

Answer 16

• Glass/plastic with lower index of refraction than core

Question 17

What buffer?

Answer 17

• Protects fiber from dmg&moisture

Question 18

What jacket

Answer 18

• Holds 1/more fibers in a cable

Question 19

Why multimode fibre more effective short distance than long?

Answer 19

At long, signal get degraded (more spread out) so has to be boosted to prevent output of being discreet

Question 20

Relationship of time taken to travel thru fibre and the angle to axis of ray?

Answer 20

The steeper the angle to the axis, the longer the light has to travel

Question 21

Difference between monomode & multimode optical fibres?

Answer 21

Monomode = 1 light mode
Multimode = multiple light modes

so damn obvious shut up

Question 22

How can monomode fibres be used at greater distances and still transfer info at greater speed?????????

Answer 22

• 1 single mode
• Reduces data loss cuz overlapping of modes of light
• Light no need reflection so no speed changes ig?