refraction of light Flashcards
1
Q
refraction?
A
the bending of light when it enters and another medium
2
Q
what is an emergent ray
A
it is a ray that is formed in a parallel-sided block and is parallel to the ray entering but displaced sideways
3
Q
when does a ray not refract
A
when light entered along the normal direction (90)
4
Q
refractive index formula
A
sini/sinr or speed of m1/speed of m2
5
Q
what is deviation
A
the bending in the first surface is added with the bending in the second surface in a prism
6
Q
dispersion?
A
when light falls on a triangular glass prism a band of the colour forms called a spectrum this is known as dispersion
7
Q
why does this occur
A
this occurs because the refractive index of glass is different for each colour
8
Q
what is the order of colour
A
vibgyor
