Answer:
They had different beliefs and backgrounds.
Explanation:
Ptolemy believed in geocentric model of the solar system -the earth at the center and the sun, other planets and stars revolved about it. His belief was based on his observation that sun and other objects in sky seemed to revolve about the Earth as they rose and set in one day.
Copernicus while reading a book, constructed the theory of heliocentric system which was later proved through observations.
Refraction as in a pencil going into water
In normal fission reactors, the fuel used to start the nuclear fission is Uranium-235.
Generally, fuel rods enriched with uranium-235 are used to start the fission. When a nucleus of uranium-235 absorbs a neutron, it becomes unstable and then it breaks apart, producing two smaller nuclei, several neutrons and energy. The additional neutrons produced in the reaction are then absorbed by other nuclei of uranium-235, triggering other fission reactions, and so on.
I believe that B is the answer.
Answer:
Part a)
Part b)
Part c)
Explanation:
Part a)
frequency of light will not change with change in medium but it will depend on the source only
so here frequency of light will remain same in both water and glass and it will be same as that in air
Part b)
As we know that the refractive index of water is given as
so the wavelength in the water medium is given as
Similarly the refractive index of glass is given as
so the wavelength in the glass medium is given as
Part c)
Speed of the wave in water is given as
Speed of the wave in glass is given as
