JEE Main 2022 (Online) 25th June Morning Shift | Geometrical Optics Question 81 | Physics

The difference of speed of light in the two media A and B (v_A $$-$$ v_B) is 2.6 $$\times$$ 10⁷ m/s. If the refractive index of medium B is 1.47, then the ratio of refractive index of medium B to medium A is : (Given : speed of light in vacuum c = 3 $$\times$$ 10⁸ ms^$$-$$1)

1.303

1.318

1.13

0.12

JEE Main 2021 (Online) 1st September Evening Shift

MCQ (Single Correct Answer)

-1

A glass tumbler having inner depth of 17.5 cm is kept on a table. A student starts pouring water ($$\mu$$ = 4/3) into it while looking at the surface of water from the above. When he feels that the tumbler is half filled, he stops pouring water. Up to what height, the tumbler is actually filled?

11.7 cm

10 cm

7.5 cm

8.75 cm

JEE Main 2021 (Online) 31st August Morning Shift

MCQ (Single Correct Answer)

-1

An object is placed at the focus of concave lens having focal length f. What is the magnification and distance of the image from the optical centre of the lens?

1, $$\infty$$

Very high, $$\infty$$

$${1 \over 2}$$, $${f \over 2}$$

$${1 \over 4}$$, $${f \over 4}$$

JEE Main 2021 (Online) 31st August Morning Shift

MCQ (Single Correct Answer)

-1

Two plane mirrors M₁ and M₂ are at right angle to each other shown. A point source 'P' is placed at 'a' and '2a' meter away from M₁ and M₂ respectively. The shortest distance between the images thus formed is : (Take $$\sqrt 5 $$ = 2.3)

JEE Main 2021 (Online) 31st August Morning Shift Physics - Geometrical Optics Question 86 English