Frequencies of various radiations are given as
\(v_{v} \rightarrow\) Visible light
\(v_{r} \rightarrow\) Radio Wave
\(v_{u v} \rightarrow\) Ultraviolet Waves
Then which of the following is true ?

A \(v_{w}<v_{v}<v_{r}\)
B \(v_{r}<v_{v}<v_{u v}\)
C \(v_{v}<v_{r}<v_{t r v}\)
D \(v_{u v}<v_{r}<v_{v}\)

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Answer & Solution

Correct Answer

(B) \(v_{r}<v_{v}<v_{u v}\)

Step-by-step Solution

Detailed explanation

(B) \(v_{r}<v_{v}<v_{u v}\)
In Electromagnetic spectrum Waves are arranged in increasing order of frequency as follows.
Radio Waves \(\rightarrow\) Microwaves \(\rightarrow\)
Infrared rays \(\rightarrow\) Visible light \(\rightarrow\) Ultraviolet rays \(\rightarrow\) X-rays \(\rightarrow\) Gamma Waves.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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Frequencies of various radiations are given as\(v_{v} \rightarrow\) Visible light\(v_{r} \rightarrow\) Radio Wave\(v_{u v} \rightarrow\) Ultraviolet WavesThen which of the following is true ?

Step-by-step Solution

Frequencies of various radiations are given as
\(v_{v} \rightarrow\) Visible light
\(v_{r} \rightarrow\) Radio Wave
\(v_{u v} \rightarrow\) Ultraviolet Waves
Then which of the following is true ?