JEE Main 2019 (Online) 10th April Evening Slot | Ray & Wave Optics Question 165 | Physics

JEE Main 2019 (Online) 10th April Evening Slot

MCQ (Single Correct Answer)

-1

In a Young's double slit experiment, the ratio of the slit's width is 4 : 1. The ratio of the intensity of maxima to minima, close to the central fringe on the screen, will be :

25 : 9

4 : 1

$${\left( {\sqrt 3 + 1} \right)^4}:16$$

9 : 1

JEE Main 2019 (Online) 10th April Evening Slot

MCQ (Single Correct Answer)

-1

The graph shows how the magnification m produced by a thin lens varies with image distance v. What is the focal length of the lens used? JEE Main 2019 (Online) 10th April Evening Slot Physics - Ray & Wave Optics Question 165 English

JEE Main 2019 (Online) 10th April Evening Slot Physics - Ray & Wave Optics Question 165 English

$${{{b^2}} \over {ac}}$$

$${{{b^2}c} \over a}$$

$${a \over c}$$

$${b \over c}$$

JEE Main 2019 (Online) 10th April Morning Slot

MCQ (Single Correct Answer)

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One plano-convex and one plano-concave lens of same radius of curvature 'R' but of different materials are joined side by side as shown in the figure. If the refractive index of the material of 1 is $$\mu $$₁and that of 2 is $$\mu $$₂, then the focal length of the combination is : JEE Main 2019 (Online) 10th April Morning Slot Physics - Ray & Wave Optics Question 168 English

JEE Main 2019 (Online) 10th April Morning Slot Physics - Ray & Wave Optics Question 168 English

$${2R \over { {{\mu _1} - {\mu _2}}}}$$

$${R \over {2 - \left( {{\mu _1} - {\mu _2}} \right)}}$$

$${R \over { {{\mu _1} - {\mu _2}}}}$$

$${R \over {2 \left( {{\mu _1} - {\mu _2}} \right)}}$$

JEE Main 2019 (Online) 10th April Morning Slot

MCQ (Single Correct Answer)

-1

A ray of light AO in vacuum is incident on a glass slab at angle 60° and refracted at angle 30° along OB as shown in the figure. The optical path length of light ray from A to B is: JEE Main 2019 (Online) 10th April Morning Slot Physics - Ray & Wave Optics Question 167 English