Question

Read the given passage based on Chemistry and answer the questions given below.
Some of the experimental phenomenon such as diffraction and interference can be explained
by the wave nature of the electromagnetic radiation. However, following are some of the
observations which could not be explained with the help of even the electromagnetic theory of
19th century.
I. the nature of emission of radiation from hot bodies Ex: (black-body radiation)
II. ejection of electrons from metal surface when radiation strikes it (photoelectric effect)
III. variation of heat capacity of solids as a function of temperature
IV. line spectra of atoms with special reference to hydrogen
It is noteworthy that the first concrete explanation for the phenomenon of the black body
radiation was given by Max Planck in 1900. This phenomenon is given below:
When solids are heated they emit radiation over a wide range of wavelengths. For example, when
an iron rod is heated in a furnace, it first turns to dull red and then progressively becomes more
and more red as the temperature increases. As this is heated further, the radiation emitted
hlue as the temperature becomes very high. In terms of​

Answer 1

Answer:

Explanation:

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