1
KCET 2019
MCQ (Single Correct Answer)
+1
-0

A certain prism is found to produce a minimum deviation of $$38^{\circ}$$. It produce a deviation of $$44^{\circ}$$ when the angle of incidence is either $$42^{\circ}$$ or $$62^{\circ}$$. What is the angle of incidence when it is undergoing minimum deviation?

A
$$30^{\circ}$$
B
$$40^{\circ}$$
C
$$49^{\circ}$$
D
$$60^{\circ}$$
2
KCET 2018
MCQ (Single Correct Answer)
+1
-0
An object is placed at the principal focus of a convex mirror. The image will be at
A
centre of curvature
B
principal focus
C
infinity
D
no image will be formed
3
KCET 2018
MCQ (Single Correct Answer)
+1
-0
An object is placed at a distance of 20 cm from the pole of a concave mirror of focal length 10 cm . The distance of the image formed is
A
+20 cm
B
+10 cm
C
-20 cm
D
-10 cm
4
KCET 2018
MCQ (Single Correct Answer)
+1
-0
A candle placed 25 cm from a lens forms an image on a screen placed 75 cm on the other side of the lens. The focal length and type of the lens should be
A
+18.75 cm and convex lens
B
-18.75 cm and concave lens
C
+20.25 cm and convex lens
D
-20.25 cm and convex lens
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