Assertion (A) The colour of radiation does not change on passing through different media. Reason (R) The…
Assertion (A) The colour of radiation does not change on passing through different media.
Reason (R) The media do not absorb or emit colours.
Both $A$ and $R$ are true and $R$ is a correct explanation for $A$.
Both $\mathrm{A}$ and $\mathrm{R}$ are true but $\mathrm{R}$ is not a correct explanation for $\mathrm{A}$.
$A$ is true but $R$ is false.
A is false but $R$ is true.
Solution
The colour of radiation does not change on passing through different media. This is because, when light radiation passes through different media, only wavelength and speed changes, but frequency remains same and colour of light radiation depends only on frequency.
Hence, Assertion (A) is true.
"The media do not absorb or emit colours" this statement is wrong. Because the absorption or emission of colours of radiation depends only on the nature of medium.
Hence, Reason is false.