If a fly gets his wings cut of, is it still a fly?
2 answers:
You might be interested in
Answer:
Wavelength of the incident wave in air = 1 m
Wavelength of the incident wave in medium 2 = 0.33 m
Intrinsic impedance of media 1 = 377 ohms
Intrinsic impedance of media 2 = 125.68 ohms
Check the explanation section for a better understanding
Explanation:
a) Wavelength of the incident wave in air
The frequency of the electromagnetic wave in air, f = 300 MHz = 3 * 10⁸ Hz
Speed of light in air, c = 3 * 10⁸ Hz
Wavelength of the incident wave in air:
Wavelength of the incident wave in medium 2
The refractive index of air in the lossless dielectric medium:
b) Intrinsic impedances of media 1 and media 2
The intrinsic impedance of media 1 is given as:
Permeability of free space,
Permittivity for air,
The intrinsic impedance of media 2 is given as:
Permeability of free space,
Permittivity for air,
ϵr = 9
c) The reflection coefficient,r and the transmission coefficient,t at the boundary.
Reflection coefficient,
You didn't put the refractive index at the boundary in the question, you can substitute it into the formula above to find it.
Transmission coefficient at the boundary, t = r -1
d) The amplitude of the incident electric field is
Maximum amplitudes in the total field is given by:
and
E = 10r, E = 10t
Answer:
The slope of a position-time graph represents an object’s velocity.
Explanation:
In a position-time graph, the values on the x-axis represent the time, while the values on the y-axis represent the position of the object.
Velocity is defined as the ratio between the displacement of an object and the time taken:
However, we can see that this definition corresponds to the slope of the curve in a position-time graph. In fact:
, the displacement, corresponds to the difference in position, so the difference between the values on the y-axis:
, the time interval, corresponds to the difference in times, so the difference between the values on the x-axis:
So, the velocity is
which corresponds to the slope of the curve.