Infrared radiations are produced when a changing electric field creates a

a.) longitudinal wave perpendicular to it
b.) changing magnetic field parallel to it
c.) changing magnetic field perpendicular to it
d.) longitudinal wave parallel to it

Option (C)

Explanation:

The electromagnetic waves are produced by accelerating charge or the oscillating charge particles.

When electric field vector and magnetic field vector are at right angles to each other interacts, then electromagnetic waves are produced. They propagate in the perpendicular direction of both electric field vector and magnetic field vector.

The examples of electromagnetic waves are gamma rays, X rays, visible rays, infrared rays, micro waves, etc.

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50