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POLYCET (2022) Mock Test Refraction Of Light At Curved Surfaces - 1
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మీకు ఏవైనా కీ లోపాలు దొరికితే లోపాలు మాకు తెలియజేయడానికి వెనుకాడవద్దు.
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Question 1 of 10
1. Question
What is the name given to line joining focal point , pole and centre of curvature ?
a. Focal length
b. Focal lens
c. Principal axis
d. Focal point -
Question 2 of 10
2. Question
A real and inverted image of the same size is formed by a convex lens , when the object is placed
a. Between F and C
b. At C
c. At F
d. Between F and Optical centre -
Question 3 of 10
3. Question
Which of the following lens act as converging lens
a. Biconvex lens
b. All
c. Convex concave
d. Plano-convex lens -
Question 4 of 10
4. Question
When a refracted ray is distracted from its original path this displacement is called
a. Reflection
b. Lateral displacement
c. Dispersion
d. Refraction -
Question 5 of 10
5. Question
The virtual image formed with a convex lens when the object is placed
a. At C
b. Beyond C
c. At F
d. Between P and F -
Question 6 of 10
6. Question
An object is placed at a distance of 10 cm from a convex lens of focal length 10 cm. The image is formed at
a. 20 cm
b. 10 cm
c. Infinity
d. 100 cm -
Question 7 of 10
7. Question
Focal length of the plano-convex lens is —–when its radius of curvature of the surface is R and n is the refractive index of the lens
a. f = R/2
b. f = R
c. f = (n – 1)/R
d. f = R/(n – 1) -
Question 8 of 10
8. Question
The parallel rays to principal axis after refraction convergent at
a. Focus
b. Beyond C
c. Pole
d. Centre of curvature -
Question 9 of 10
9. Question
If focal length (f) is 20 cm and object distance (u) is 30 cm is placed on the principal axis of convex lens then , What is the value of image distance (v) ?
a. 60 cm
b. 20 cm
c. 40 cm
d. 80 cm -
Question 10 of 10
10. Question
The ratio of speed of light in air to speed of light in any medium is called
a. Radius of curvature
b. Absolute refractive index
c. Pole
d. Refractive index