JEE Main 2020 (Online) 6th September Morning Slot | Ray & Wave Optics Question 129 | Physics

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) :

JEE Main 2020 (Online) 5th September Morning Slot Physics - Ray & Wave Optics Question 134 English Option 1

JEE Main 2020 (Online) 5th September Morning Slot Physics - Ray & Wave Optics Question 134 English Option 2

JEE Main 2020 (Online) 5th September Morning Slot Physics - Ray & Wave Optics Question 134 English Option 3

JEE Main 2020 (Online) 5th September Morning Slot Physics - Ray & Wave Optics Question 134 English Option 4

JEE Main 2020 (Online) 4th September Morning Slot

MCQ (Single Correct Answer)

-1

A beam of plane polarised light of large
cross-sectional area and uniform intensity
of 3.3 Wm^-2 falls normally on a
polariser (cross sectional area 3 $$ \times $$ 10^-4 m²) which
rotates about its axis with an angular speed
of 31.4 rad/s. The energy of light passing through
the polariser per revolution, is close to :

1.0 $$ \times $$ 10^-5 J

1.0 $$ \times $$ 10^-4 J

1.5 $$ \times $$ 10^-4 J

5.0 $$ \times $$ 10^-4 J

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