NEET 2018 | Geometrical Optics Question 29 | Physics

A thin prism having refracting angle 10^o is made of glass of refractive infex 1.42. This prism is combined with another thin prism of glass of refractive index 1.7. This combination producess dispersion without deviation. The refracting angle of second prism should be

6^o

8^o

10^o

4^o

NEET 2017

MCQ (Single Correct Answer)

-1

A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source L. When the mirror is rotated through a small angle $$\theta $$, the spot of the light is found to move through a distance y on the scale. The angle $$\theta $$ is given by

$${y \over x}$$

$${x \over {2y}}$$

$${x \over {y}}$$

$${y \over {2x}}$$

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

A person can see clearly objects only when they lie between 50 cm and 400 cm from his eyes . In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use. will be

convex, + 2.25 diopter

concave, $$-$$0.25 diopter

concave, $$-$$0.2 diopter

convex, + 0.15 diopter

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