The heat and energy of coal burning is more easier and more efficient to turn into electricity than any method using renewable resources.
Answer:
Explanation:
a ) Slit separation d = .1 x 10⁻³ m
Screen distance D = 4 m
wave length of light λ = 650 x 10⁻⁹ m
Width of central fringe = λ D / d
= ![\frac{650\times10^{-9}\times4}{.1\times10^{-3}}](https://tex.z-dn.net/?f=%5Cfrac%7B650%5Ctimes10%5E%7B-9%7D%5Ctimes4%7D%7B.1%5Ctimes10%5E%7B-3%7D%7D)
= 26 mm
b ) Distance between 1 st and 2 nd bright fringe will be equal to width of dark fringe which will also be equal to 26 mm
c ) Angular separation between the central maximum and 1 st order maximum will be equal to angular width of fringe which is equal to
λ / d
= ![\frac{650\times10^{-9}}{.1\times10^{-3}}](https://tex.z-dn.net/?f=%5Cfrac%7B650%5Ctimes10%5E%7B-9%7D%7D%7B.1%5Ctimes10%5E%7B-3%7D%7D)
= 6.5 x 10⁻³ radian.
Planetary Nebula are the outer layers of a star that are lost when the star changes from a red giant to a white dwarf. A star is a luminous globe of gas producing its own heat and light by nuclear reactions (nuclear fusion). They are born from nebulae and consist mostly of hydrogen and helium gas.
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