Question

Arrange the following in increasing order of energy. A. IR
B. UV
C. X-ray
D. Microwave
E. Visible rays
Choose the correct answer from the options given below :

• A. C, B, E, A, D
• B. D, A, E, B, C
• C. A, B, C, D, E
• D. B, C, A, E, D

Hint:

Energy increases as: Microwave → IR → Visible → UV → X-ray.

Answer 1

The Correct Option is B

Concept: Energy of electromagnetic radiation is directly proportional to frequency: \[ E = h\nu \] Thus, higher frequency means higher energy.

Step 1: Understanding spectrum order.
Electromagnetic spectrum in increasing energy: \[ \text{Microwave} < \text{Infrared} < \text{Visible} < \text{Ultraviolet} < \text{X-rays} \]

Step 2: Matching with given symbols.

• Microwave → D

• IR → A

• Visible → E

• UV → B

• X-ray → C

Step 3: Writing sequence.
\[ D \rightarrow A \rightarrow E \rightarrow B \rightarrow C \]

Step 4: Verification.
This matches option (2). Final Conclusion:
Hence, the correct answer is option (2).