Among these, the greatest impact would have to be Newton's first law, the law of gravity. All of the planets stay in their own orbits, even if their orbits are not exactly perfect. This is done because of the sun's gravitational force, which keeps all of the planets in the solar system revolving around it.
If the object is kept in between the principle axis and the focus but some what nearer to the focus then we will get the enlarge,erect,and real image.
A body revolving in circle generally has tangential acceleration if the speed is changing. Since the speed is uniform here, the tangential acceleration is zero.
centripetal acceleration is directed towards the center and is given as
a = v²/r where a = centripetal acceleration , v = speed , r = radius
Since both speed and radius are constant here, the centripetal acceleration is constant and is always directed towards the center.
hence the correct choice is
The acceleration is directed toward the center.
The different types of radiation in electromagnetic spectrum are compared by the amount of energy found in the photons.
Radio waves have photons with low energies, microwave photons have a little more energy than radio-waves. Infrared photons still have more energy, then comes visible, ultraviolet, x-rays and the most energetic of all, gamma rays.
The energy associated with electromagnetic radiation is proportional to frequency and inversely proportional to wavelength. So, electromagnetic waves with shorter wavelengths have more energy.
On one end of the electromagnetic spectrum are radio waves, which have wavelengths billions of times longer than those of visible light. On the other end of the spectrum are gamma rays with wavelengths billions of times smaller than those of visible light.
To know more about electromagnetic spectrum:
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