NEET 2022 Phase 1 | Electromagnetic Waves Question 9 | Physics

When light propagates through a material medium of relative permittivity $$\varepsilon $$_r and relative permeability $$\mu$$_r, the velocity of light, v is given by (c-velocity of light in vacuum)

v = c

$$v = \sqrt {{{{\mu _r}} \over {{\varepsilon _r}}}} $$

$$v = \sqrt {{{{\varepsilon _r}} \over {{\mu _r}}}} $$

$$v = {c \over {\sqrt {{\varepsilon _r}{\mu _r}} }}$$

NEET 2021

MCQ (Single Correct Answer)

-1

For a plane electromagnetic wave propagating in x-direction, which one of the following combination gives the correct possible directions for electric field (E) and magnetic field (B) respectively?

$$ - \widehat j + \widehat k, - \widehat j + \widehat k$$

$$ \widehat j + \widehat k, \widehat j + \widehat k$$

$$ - \widehat j + \widehat k, - \widehat j - \widehat k$$

$$\widehat j + \widehat k, - \widehat j - \widehat k$$

NEET 2020 Phase 1

MCQ (Single Correct Answer)

-1

The ratio of contributions made by the electric field and magnetic field components to the intensity of and electromagnetic wave is : (c = speed of electromagnetic waves)

1 : 1

1 : c

1 : c²

c : 1

NEET 2019

MCQ (Single Correct Answer)

-1

Which colour of the light has the longest wavelength?

blue

violet

red

green

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NEET Subjects

Biology

Zoology

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