Chapter 14 Flashcards
What are laws of reflection
Angle of I equal to angle of reflection
Incident, reflected ray and normal
Characteristics of plane mirror
Virtual
uprgith
distance same
laterally inverted
same size as object
What is refraction
bending of light due to change in speed of light as light rays travel from one medium to another
Laws of refraction
Ratio for sin of incidence to the sin of angle of refraction is constant
When light travels in optically less dense medium to optically denser, still bend towards the normal
Refraction indeex
sin I/sin r
What is speed of light
3 x 10^8
Why does total internal reflection
light travel from optically denser to less dance
Angle of I I denser med is greater than critical angle
What is critical angle
angle of incidence in optically denser med where angle of r is in optically less dense medium is 90
Formula to find critical angle
sinc =1/n
Applications of total internal reflection
optical fibres inTelecommunication
(carry more info
What is focal point
parallel beam of light converse at after passing through lens
