JEE Main 2022 (Online) 29th June Evening Shift | Geometrical Optics Question 72 | Physics

The speed of light in media 'A' and 'B' are $$2.0 \times {10^{10}}$$ cm/s and $$1.5 \times {10^{10}}$$ cm/s respectively. A ray of light enters from the medium B to A at an incident angle '$$\theta$$'. If the ray suffers total internal reflection, then

$$\theta = {\sin ^{ - 1}}\left( {{3 \over 4}} \right)$$

$$\theta > {\sin ^{ - 1}}\left( {{2 \over 3}} \right)$$

$$\theta < {\sin ^{ - 1}}\left( {{3 \over 4}} \right)$$

$$\theta > {\sin ^{ - 1}}\left( {{3 \over 4}} \right)$$

JEE Main 2022 (Online) 28th June Morning Shift

MCQ (Single Correct Answer)

-1

The refracting angle of a prism is A and refractive index of the material of the prism is cot (A/2). Then the angle of minimum deviation will be -

180 $$-$$ 2A

90 $$-$$ A

180 + 2A

180 $$-$$ 3A

JEE Main 2022 (Online) 28th June Morning Shift

MCQ (Single Correct Answer)

-1

The aperture of the objective is 24.4 cm. The resolving power of this telescope, if a light of wavelength 2440 $$\mathop A\limits^o $$ is used to see th object will be :

8.1 $$\times$$ 10⁶

10.0 $$\times$$ 10⁷

8.2 $$\times$$ 10⁵

1.0 $$\times$$ 10^$$-$$8

JEE Main 2022 (Online) 27th June Evening Shift

MCQ (Single Correct Answer)

-1

A convex lens has power P. It is cut into two halves along its principal axis. Further one piece (out of the two halves) is cut into two halves perpendicular to the principal axis (as shown in figures). Choose the incorrect option for the reported pieces.

JEE Main 2022 (Online) 27th June Evening Shift Physics - Geometrical Optics Question 79 English