JEE Main 2020 (Online) 6th September Evening Slot | Ray & Wave Optics Question 127 | Physics

JEE Main 2020 (Online) 6th September Evening Slot

MCQ (Single Correct Answer)

-1

A double convex lens has power P and same radii of curvature R of both the surfaces. The radius of curvature of a surface of a plano-convex lens made of the same material with power 1.5 P is :

$${R \over 3}$$

$${{3R} \over 2}$$

$${R \over 2}$$

JEE Main 2020 (Online) 6th September Morning Slot

MCQ (Single Correct Answer)

-1

A point like object is placed at a distance of 1 m in front of a convex lens of focal length 0.5 m. A plane mirror is placed at a distance of 2 m behind the lens. The position and nature of the final image formed by the system is :

2.6 m from the mirror, real

1 m from the mirror, real

2.6 m from the mirror, virtual

1 m from the mirror, virtual

JEE Main 2020 (Online) 6th September Morning Slot

MCQ (Single Correct Answer)

-1

In the figure below, P and Q are two equally intense coherent sources emitting radiation of wavelength 20 m. The separation between P and Q is 5 m and the phase of P is ahead of that of Q by 90^o. A, B and C are three distinct points of observation, each equidistant from the midpoint of PQ. The intensities of radiation at A, B, C will be in the ratio : JEE Main 2020 (Online) 6th September Morning Slot Physics - Ray & Wave Optics Question 130 English

JEE Main 2020 (Online) 6th September Morning Slot Physics - Ray & Wave Optics Question 130 English

4 : 1 : 0

2 : 1 : 0

0 : 1 : 2

0 : 1 : 4

JEE Main 2020 (Online) 5th September Morning Slot

MCQ (Single Correct Answer)

-1

For a concave lens of focal length f, the relation between object and image distances u and v, respectively, from its pole can best be represented by (u = v is the reference line) :