Question

a) Certain clectromagnetic radiations change the paper dipped in silver chloride

solution, violet in colour.

i) Identify the radiations,

ii) State material of the prism used to obtain these radiations.
iii)State one important use of this radiation.​

Answer 1

Explanation:

Johann Ritter decided to place silver chloride in the area just beyond the violet end of the spectrum, in a region where no sunlight was visible. To his amazement, he saw that the silver chloride displayed an intense reaction well beyond the violet end of the spectrum, where no visible light could be seen. This showed for the first time that an invisible form of light existed beyond the violet end of the spectrum. This new type of light, which Ritter called Chemical Rays, later became known as ultraviolet light or ultraviolet radiation (the word ultra means beyond).

Hence, the radiation which can be detected by a solution of silver chloride is Ultraviolet radiation.