POLYCET (2022) Mock Test Refraction of light At Plane Surfaces - 1
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The process of changing speed when light travels from one medium to another is called
The unit for refractive index is
b. No units
c. m/s square
d. kg/ cube
Consider the following
A: The light ray must travel from denser medium to rarer medium to form Total internal reflection
B: The angle of incidence in denser medium should be greater than the critical angle for the pair of media in contact
a. A is correct, B is false
b. B is correct
c. A is correct
d. B is correct, A is false
1.52 is refractive index for
a. Crown glass
For heart surgery doctor sent a tube to see internal parts on computer.What is that tube?
c. Optical fiber
The refractive index of medium 1 relative to medium 2 is 4/3.then the refractive index of medium 2 relative to medium 1 is
Mirages are an example for
a. Multiple reflection
b. Total internal reflection
c. Critical angle
Which of the following is a result of change in speed of light at the interface?
b. Critical angle
d. refractive index
Which of the following material has less refractive index?
b. Rock salt
13. 1 micrometer=
a. 10 power -4 m
b. 10 power -8 m
c. 10 power -6 m
d. 10 power -9 m
Optical fibres work on
a. Multiple reflections
b. Total internal reflection
1.50 is refractive index for
The process of changing speed when light travels from one medium to another medium is called
a. Refraction of light
b. Refractive index
c. Reflection of light
When angle of incidence is equal to critical angle then angle of refraction is equal to?
a. 30 degrees
b. 90 degrees
c. 45 degrees
d. 0 degree
1.54 is the refractive index of which material?
d. Rock salt
The basic cause of refraction is
a. When light is incident on a boundary
b. When the refractive indices of two media are equal
c. The change in the speed of light in going from one medium to another
d. When the refractive indices of two media are not equal
If critical angle is 45 degrees, then refractive index is
Observe the following
X: When a mirror is immersed in water,its focal length doesn’t change
Y: Focal length of a mirror is independent of surrounding medium
a. X is right
b. Y is right
c. X , Y are false
d. X , Y are right
A ray of light is incident on a plane surface of refractive index root 3 at certain angle.it is found that the reflected and refracted rays are perpendicular to each other. The angle of incidence is
a. 45 degrees
b. 15 degrees
c. 30 degrees
d. 60 degrres
The critical angle of diamonds
a. 24.4 degrees
b. 24 degrees
c. 26.4 degrees
d. 23.4 degrees