https://uadoc.uacdn.net/doubts/2AIKVNE5RO/1642729588RIMRC8IB.jpeg

19. An EM wave from air enters a medium. The electric fields are
?, = Eo2ê cos[k(27-ct] in medium, where the wave number k and frequency v refer to
air and
v
their values in air. The medium is nonmagnetic. If £r refer erz to relative permittivities of air and
medium respectively, which of the following options is correct?
En 1
Es
a.
4
En
1
b.
Er
2
C
=4
En = 2
d.
Ese


English

Educator solution

Physics

IIT JEE 2020 and 2021 Main and Advanced exam preparation. Know about detailed syllabus, best books, exam pattern and dates. Cover previous year question papers and book solutions from great educators.

Overall

Chemistry

Mathematics

IIT JEE

IITJEE, NEET UG and Foundation

Ace the toughest competitive and government exams in India 

Doubt solution

Doubt details

Physics

AUTO-GENERATED

Solutions available

Educator solution

Educator solution

Educator solution