Answer:
to see the beautiful world
to focus the light onto the retina
Igneous rocks are formed from molten rock cooling. Rift zones are a common place for them to form because there is two tectonic plates connecting which is a common place for volcanoes to form.
A star is a luminous ball of hot <span>plasma </span><span>held together by its own gravity.
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Given that,
The electric field is given by,

Suppose, B is the amplitude of magnetic field vector.
We need to find the complete expression for the magnetic field vector of the wave
Using formula of magnetic field
Direction of
vector is the direction of propagation of the wave .
Direction of magnetic field = 

We need to calculate the poynting vector
Using formula of poynting

Put the value into the formula


Hence, The poynting vector is 