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WorksheetsRECAP
Total questions: 20
Worksheet time: 10mins
The phenomenon by which the incident light falling on a surface is sent back into the same medium is known as ________.
REFLECTION
REFRACTION
POLARISATION
DIFFRACTION
Choose the laws of reflection and refraction.
The reflected and refracted rays are in the same plane as the incident ray and the normal.
The angle of incidence equals the angle of reflection
For waves of a particular frequency and for a chosen pair of media the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant called the (relative) refractive index
ALL THE ABOVE
When light travels from denser to rarer medium, it bends-------
it bends away from the normal
it bends towards the normal
When light travels from rarer to denser medium, it bends-------
it bends away from the normal
it bends towards the normal
When light travels from a denser medium to a rare medium speed of light will-------
increase
decrease
remains same
When light travels from a rarer medium to a denser medium speed of light will--------
increase
decrease
remains same
A ray of light is incident on a plane mirror and the angle of reflection is 50 degrees. What is the angle between the incident ray and the reflected ray?
50 degree
100 degree
90 degree
180 degree
According to the laws of reflection, if i = angle of incidence and r = angle of reflection,
i=r
i<r
i>r
i is not equal to r
A ray of light is incident on a plane mirror and the angle of incidence is 25 degrees. What is the angle of reflection?
0 degrees
25 degrees
50 degrees
90 degrees
sinθ1/sinθ2 = 1n2 , this expression represents,
Snell's law
Malu's law
When light is normal on a surface Snell’s law breaks down because the light passes directly through the surface
True
False
Absolute refractive index of air is ,
1
2
3
4
1n2- Represnets
relative refractive index going from medium 1 to medium 2
relative refractive index going from medium 2 to medium 1
2n1- represents
relative refractive index going from medium 2 to medium 1
relative refractive index going from medium 1 to medium 2
if angle of incidence is greater than critical angle
Total internal reflection
refraction
reflection
polarisation
if angle of incidence is equal to critical angle
angle of refraction is 90 degree
total internal reflection
reflection
refraction
The condition for total internal reflection,choose correct statements
light must travel from denser to rarer medium
light must travel from rarer to denser medium
angle of incidence is lesser than critical angle
angle of incidence is greater than critical angle
If angle of incidence is less than critical angle
Refraction of light
Reflection of light
Is there a loss of energy during total internal reflection?
yes
no
When the angle of refraction is 90 ° the angle of incidence is called the...
Critical angle
Angle of total internal reflection
