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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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
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
Which of the following lens act as converging lens
a. Biconvex lens
c. Convex concave
d. Plano-convex lens
When a refracted ray is distracted from its original path this displacement is called
b. Lateral displacement
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
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
d. 100 cm
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)
The parallel rays to principal axis after refraction convergent at
b. Beyond C
d. Centre of curvature
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
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
d. Refractive index