Answer:
Explanation:
It is given that,
The radius of the solid sphere, R = 50 cm = 0.5 m
Charge on the sphere,
We need to find the magnitude of the electric field r = 10.0 cm away from the center of the sphere. The electric field at point r away form the center of the sphere is given by :
So, the electric field 10.0 cm away from the center of the sphere is . Hence, this is the required solution.
Answer:
a)
b)
Explanation:
We are comparing two wavelengths with the radius and diameter constant, and if we want to compare it, we need to use the following formula:
Where represent the angular resolution and the wavelength.
So if we have a fixed resolution and wavelength 1 and we want to find the resolution for a new condition we can solve for and we got
Part a
For this case the subindex 1 is for the color red and we know that:
And the angular resolution for the color red is specified as
And for the infrared case we know that , so if we replace we got:
Part b
For this case the subindex 1 is for the color red and we know that:
And the angular resolution for the color red is specified as
And for the ultraviolet case we know that , so if we replace we got: