For any wave, the product of
(frequency) x (wavelength)
is constant ... it's the wave's speed.
So you can see that if either the frequency or the wavelength changes, the other one must change in the opposite direction, to keep their product constant.
Shorter wavelength <==> higher frequency.
Longer wavelength <==> lower frequency.
1) There must be a force
2) There must be displacement
Answer:
Explanation:
It is given that,
Electric field due to the spark,
Dimensions of the parallel-plate capacitor is 5.1 cm × 5.1 cm.
The area of the parallel plate,
The electric field due to the parallel plate capacitor is given by :
Let n is the number of electrons that must transferred from one plate to the other to create a spark between the plates. It can be calculated as :
So, the number of electrons must be transferred from one plate to the other is . Hence, this is the required solution.
Electric field strength near the surface of sphere is given by
Now we have
Q = 1 C
R = 5 cm
now electric field is given by
Part B)
Since charge on the sphere is very large to electric field near its surface is too high. So this is reasonable result near it.
Part c)
As per our assumption the charge is uniformly distributed on the surface and there is no effect of surrounding charge or surrounding electric field.
Answer:
n = 1.49
Explanation:
Given that,
Angle of incidence = 30 degrees
Angle of refraction = 19.5 degrees
We need to find the refractive index of the honey. Using Snell's law, we can find it as follows :
So, the refractive index of honey is 1.49.