NEET 2017 | Wave Optics Question 18 | Physics

Young's double slit experiment is first performed in air and then in a medium other than air. It is found that 8^th bright fringe in the medium lies where 5^th dark fringe lies in air. The refractive index of the medium is nearly

1.59

1.69

1.78

1.25

NEET 2017

MCQ (Single Correct Answer)

-1

The ratio of resolving powers of an optical microscope for two wavelength $$\lambda $$₁ = 4000 $$\mathop A\limits^ \circ $$ and $${\lambda _2}$$ = 6000 $$\mathop A\limits^ \circ $$ is

9 : 4

3 : 2

16 : 81

8 : 27

NEET 2017

MCQ (Single Correct Answer)

-1

Two polaroids P₁ and P₂ are placed with their axis perpendicular to each other. Unpolarised light $$I$$₀ is incident on P₁. A third polaroid P₃ is kept in between P₁ and P₂ such that its axis makes an angle 45^o with that of P₁. The intensity of transmitted light through P₂ is

$${{{I_0}} \over 4}$$

$${{{I_0}} \over 8}$$

$${{{I_0}} \over 16}$$

$${{{I_0}} \over 2}$$

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

The interference pattern is obtained with two coherent light sources of intensity ratio n. In the interference pattern, the ratio $${{{I_{max}} - {I_{\min }}} \over {{I_{max}} + {I_{min}}}}$$ will be

$${{\sqrt n } \over {n + 1}}$$

$${{2\sqrt n } \over {n + 1}}$$

$${{\sqrt n } \over {{{\left( {n + 1} \right)}^2}}}$$

$${{2\sqrt n } \over {{{\left( {n + 1} \right)}^2}}}$$

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Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution