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WorksheetsCritical Angle & Refraction
Total questions: 10
Worksheet time: 5mins
If Total Internal Reflection occurs the light will bounce back at the same angle it came in
True
False
If light hits at an angle larger than the critical angle it will refract and pass through the material
True
False
Light travels from glass (n=1.66) to water, what is the critical angle for these two mediums?
53.2
48.8
37
not possible
Why is refractive index in a transparent mediun greater than one?
speed of light in vaccum is always less than speed in a transparent medium
speed of light in vaccum is always greater than speed in a transparent medium
frequency of wave changes when it crosses medium
none of the above
light travelling from a transparent medium to air undergoes total internal reflection at an angle of incidence of 45degree. THe refractive index of the medium may be
1.4
1.3
1.1
1.0
The principal behind optical fibres is
total internal reflection
total external reflection
total internal refraction
diffraction
The time taken by the kight to cross a glass of thickness 4mm and refractive index =3, will be
4x 10-11sec
16 x 10-11sec
8 x 10-11sec
24 x 10-11sec
