Refraction of light Flashcards
What is the normal?
90 degrees to the surface + doesn’t refract
ray of light > water = ?
slows down + refracts
ray of light < water = ?
speeds up + refracts
Which lens focuses light?
convex
Which lens diffracts light into a spectrum of colours?
prism
Which lens lens cause light to diverge?
concave
What type of material cause light to refract?
transparent
Formula for refractive index?
n = c/cs
(c = speed of light)
(cs = velocity of light in material)
What is snell’s law?
When ray of light passes from less dense to more dense, speed change ( slow down) & direction bend toward normal
Why mirror reflect?
Cuz angle of incidence ig?
Light in glass block explanation please?
Material is denser, light slow down and refracts
Light in prism explain damn
Blue light refracts more?
Spectrum made and refracts all colours cuz diff wavelengths
Look at page 9 cuz i dont get it bro
Okay u loser
4 things of multimode optical fibres?
Core
Cladding
Buffer
Jacket
What da core?
- glass/plastic with higher index of refraction than cladding
- Carries the signal
What cladding?
- Glass/plastic with lower index of refraction than core
What buffer?
- Protects fiber from dmg&moisture
What jacket
- Holds 1/more fibers in a cable
Why multimode fibre more effective short distance than long?
At long, signal get degraded (more spread out) so has to be boosted to prevent output of being discreet
Relationship of time taken to travel thru fibre and the angle to axis of ray?
The steeper the angle to the axis, the longer the light has to travel
Difference between monomode & multimode optical fibres?
Monomode = 1 light mode
Multimode = multiple light modes
so damn obvious shut up
How can monomode fibres be used at greater distances and still transfer info at greater speed?????????
- 1 single mode
- Reduces data loss cuz overlapping of modes of light
- Light no need reflection so no speed changes ig?
