✅ Ray Optics Short Notes ✅
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⚡ElectroMagnetic Induction (EMI)
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The forces responsible for a body regaining its shape after removal of deforming forces are ________
Anonymous Quiz
22%
gravitational forces between atoms
39%
electromagnetic forces between atoms
18%
nuclear forces within an atom
21%
combination of gravitational & nuclear forces between atoms
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Which of the following quantities have the same S.I. unit as that of modulus of elasticity?
Anonymous Quiz
38%
Energy per unit volume
39%
Force per unit length
13%
Energy
10%
Change in length
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Calculate the velocity of the light ray in the medium, if the critical angle for TIR from medium to the vacuum is 30°.
Anonymous Quiz
16%
2 x 108 m/s
44%
1.5 x 108 m/s
23%
0.75 x 108 m/s
17%
3 x 108 m/s
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Which of the following is the combination that is used in the formation of achromatic lenses?
Anonymous Quiz
29%
1 convex and 1 plane mirror
29%
2 convex lenses
37%
1 convex and 1 concave lens
5%
2 concave lenses
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How does magnifying power change for an objective lens if the focal length of the objective lens is increased?
Anonymous Quiz
30%
The microscope will decrease but for the telescope, it will increase
43%
The microscope will increase but for the telescope, it decreases
21%
The microscope and telescope will increase
6%
The microscope and telescope will decrease
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What is the magnification produced by the plane mirror?
Anonymous Quiz
25%
0
43%
+1
10%
-1
22%
0 to infinity
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The image formed by the convex mirror is 1/n times the object and has a focal length f. What is the distance of object from the mirror?
Anonymous Quiz
26%
(n + 1)f
37%
(n – 1)f
30%
{(n+1)/n}f
7%
{(n−1)\n}f
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