Question

The CORRECT sequence(s) of electromagnetic radiations in terms of increasing wavelength is/are:

• A. Gamma ray < UV < Near-IR
• B. X-ray < Visible light < Thermal IR
• C. Microwave < Visible light < Radio wave
• D. Microwave < Thermal IR < Near-IR

Hint:

Always remember: higher energy = shorter wavelength. Gamma rays are the shortest, while radio waves are the longest.

Answer 1

The Correct Option is A, B

Step 1: Recall electromagnetic spectrum order. From shortest wavelength to longest: \[ \text{Gamma rays} < \text{X-rays} < \text{UV} < \text{Visible light} < \text{Near IR} < \text{Thermal IR} < \text{Microwave} < \text{Radio waves} \]

Step 2: Check each option. - (A) Gamma ray < UV < Near-IR → Correct (matches spectrum order). - (B) X-ray < Visible light < Thermal IR → Correct. - (C) Microwave < Visible light < Radio wave → Incorrect, because visible light comes before microwave. - (D) Microwave < Thermal IR < Near-IR → Incorrect, order is reversed (Near-IR < Thermal IR < Microwave).

Final Answer: \[ \boxed{A \text{ and } B} \]