Someone answer this question please
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Answer:
The wavelength of radio waves is much longer than the wavelength of visible light waves
Explanation:
Electromagnetic waves are periodic oscillations of the electric and the magnetic fields, occuring in a plane perpendicular to the direction of motion the wave.
Electromagnetic waves are the only waves able to travel in a vacuum; they travel at the speed of light:
Electromagnetic waves are also classified into 7 different types, according to their wavelength/frequency. From longest to shortest wavelength, we have: (with the corresponding wavelength written in the brackets):
Radio waves (>1 m)
Microwaves (1 mm - 1 m)
Infrared (750 nm - 1 mm)
Visible light (380 nm - 750 nm)
Ultraviolet (10 nm - 380 nm)
X-rays (0.01 nm - 10 nm)
Gamma rays (<0.01 nm)
So from the table, we can see that:
The wavelength of radio waves is much longer than the wavelength of visible light waves.
To solve this problem we can apply the concept related to thermal expansion, including the analogy with resistance and final intensity.
The mathematical expression that describes the expansion of a material by a thermal process is given by
Where
= Initial resistance
Thermal expansion coefficient
Change in the temperature
If we want to directly obtain the final value of the resistance of the object, you would simply add the initial resistance to this equation - because at this moment we have the result of how much resistance changed, but not of its final resistance - So,
Re-arrange to find the change at the temperature,
Since the resistance is inversely proportional to the current and considering that the voltage is constant then
Then,
<em>(It is possible that there is a typing error and the value is not 4.5 but 4.3, so the closest approximate result would be 1627K and mark this as the correct answer)</em>