The amount of potential energy possessed by an elevated object is equal to

Potential energy of the object will be equal to mgh

Explanation:

Let the mass of the object is m

Acceleration due to gravity is

Let the object is released from height h

We have to find the potential energy

Potential energy is of an object released from height h is equal to

, here m is mass, g is acceleration due to gravity and h is height from which object is released.

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation:

b.

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