Answer:
Explanation:
The speed of light (electromagnetic wave) is given by the following formula:
(1)
Where:
is the speed of light
the frequency
the wavelength
So, we have to find from (1):
(2)
But we are asked to find the wavelength in nm. If we know , then:
Finally:
The formula for distance is speed times time.
So 3 times 6 would be 18 m/s
Answer:
The value is
Explanation:
From the question we are told that
The dielectric constant is k = 1.5
The area of each plate is
The distance between the plates is
The charge on the capacitor is
Generally the electric field in a vacuum is mathematically represented as
Generally is the voltage of the capacitor which is mathematically represented as
Here is the capacitance of the capacitor in a vacuum which is mathematically represented as
Here is a constant with value
=>
=>
So
So
=>
The electric field when the dielectric slab is inserted is mathematically represented as
=>
=>
Generally the electric field between the plates is mathematically evaluated as
=>
=>
Generally the potential difference between the plates is
=>