What law states that when there is an interaction between charged objects there is a non-contact force which acts over some dist
2 answers:
Answer:
Coulomb's law
Explanation:
The correct answer is Coulomb's law and it deals with particles which undergo interactions based on their electric charges.
It states that the electrostatic force acting between two charged particles is directly proportional to the product of the charges of the two particles and is inversely proportional to the square of the distance between them.
The constant of proportionality is called Coulomb's constant.
Mathematically, it is given as:
where k = Coulomb's constant
q = charge of first particle
Q = charge of second particle
r = distance between both particles
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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.