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JEE Main 2022 (Online) 26th June Morning Shift
Numerical
+4
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A light ray is incident, at an incident angle $$\theta$$1, on the system of tow plane mirrors M1 and M2 having an inclination angle 75$$^\circ$$ between them (as shown in figure). After reflecting from mirror M1 it gets reflected back by the mirror M2 with an angle of reflection 30$$^\circ$$. The total deviation of the ray will be _____________ degree.

JEE Main 2022 (Online) 26th June Morning Shift Physics - Geometrical Optics Question 71 English

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2
JEE Main 2022 (Online) 24th June Evening Shift
Numerical
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A ray of light is incident at an angle of incidence 60$$^\circ$$ on the glass slab of refractive index $$\sqrt3$$. After refraction, the light ray emerges out from other parallel faces and lateral shift between incident ray and emergent ray is 4$$\sqrt3$$ cm. The thickness of the glass slab is __________ cm.

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3
JEE Main 2022 (Online) 24th June Morning Shift
Numerical
+4
-1
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Two identical thin biconvex lens of focal length 15 cm and refractive index 1.5 are in contact with each other. The space between the lenses is filled with a liquid of refractive index 1.25. The focal length of the combination is __________ cm.

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4
JEE Main 2021 (Online) 31st August Evening Shift
Numerical
+4
-1
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Cross-section view of a prism is the equilateral triangle ABC in the figure. The minimum deviation is observed using this prism when the angle of incidence is equal to the prism angle. The time taken by light to travel from P (midpoint of BC) to A is ______________ $$\times$$ 10$$-$$10 s. (Given, speed of light in vacuum = 3 $$\times$$ 108 m/s and cos30$$^\circ$$ = $${{\sqrt 3 } \over 2}$$)

JEE Main 2021 (Online) 31st August Evening Shift Physics - Geometrical Optics Question 80 English
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