Flashcards in Other uses of light Deck (5)
What is total internal reflection?
As the angle of incidence increases, so does the angle of refraction
Beyond a certain angle, called the critical angle, all the waves reflect back into the glass and no refraction occurs
What is an optical fibre?
thin rod of glass
light enter at one end and undergoes repeated total internal reflection
the light emerges at the other end
used in cable TV and broadband
What is an endoscope
endoscope use optical fibres
doctors insert the fibres in the body
some carry light into the body and some carry light reflected from the internal surfaces in the body
used by doctors in diagnosis
What are lasers?
laser produce an intense narrow beam of light
laser light has a low divergence