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Class 12
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Refractive Index of a Liquid
Refractive Index of a Liquid
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1)
The bending of a beam of light when it passes obliquely from one medium to another is known as _______.
Dispersion
Reflection
Deviation
Refraction
2)
What type of lens is formed when a convex lens is placed over some drops of the given liquid on a plane mirror?
Combination of convex and concave lenses.
A plano–convex lens.
A plano-concave liquid lens.
None of these.
3)
Which one of the following is the refractive index of water:
1.461
1.333
1.420
1.520
4)
In liquid lens experiment a concave lens is placed on a plane mirror. If the distance of the pointer from the top of the lens is 23.75 cm and that from the bottom of the lens is 24.25 cm, what will be the focal length of the convex lens?
25 cm
24 cm
24.25 cm
23.75 cm
5)
If the focal length of the convex lens (f₁) is 24 cm and focal length of the combination of convex lens and liquid lens (F) is 19 cm, what will be the focal length (f₂) of the liquid lens?
90 cm
95.3 cm
91.2 cm
81.9 cm
6)
If the radius of curvature of the convex lens, which is in contact with the liquid, is 30 cm and the focal length of the liquid lens is 71.4 cm, what will be the refractive index of the liquid?
1.47
1.33
1.45
1.42
7)
In liquid lens experiment, a convex mirror is placed over a liquid, which is placed on a plane mirror. If the distance of the pointer from the top of the lens is 26.5 cm and that from the bottom of the lens is 27.5 cm, what will be the thickness of the lens?
1.5 cm
1 cm
0.5 cm
10 cm
8)
In liquid lens experiment, a convex lens is floated in mercury. If f is the focal length of the convex lens and d is the distance of the pointer from the top of the lens, which one of the following is the correct equation representing the radius of curvature of the lens?
9)
If R is the radius curvature of the convex lens which is in contact with the liquid and f₂ is the focal length of the liquid lens, which one of the following is the correct equation representing the refractive index of the liquid?
10)
If f₁ is the focal length of the convex lens and F is the focal length of the combination of convex lens and plano-concave liquid lens, which one of the following is the correct equation representing the focal length of liquid lens?