Note the different types of electromagnetic radiation :
(1) X-rays
(2) radio waves
(3) gamma rays
(4) visible light
(5) infrared radiation
(6) ultraviolet radiation
Which list correctly ranks the electromagnetic waves in order of increasing frequency ?

Options

A. 2,3,4,5,6,1
B. 2,5,4,6,1,3
C. 2,5,4,1,6,3
D. 3,1,6,4,5,2

Answer

To rank the different types of electromagnetic radiation in order of increasing frequency, we first need to know the general order of frequencies for each type of electromagnetic wave. The frequency of electromagnetic waves increases as we move from radio waves to gamma rays. Here’s how we can approach the solution step by step:

### Step-by-Step Solution:

1. **Identify the Types of Electromagnetic Radiation**:
- List the types of electromagnetic radiation provided in the question:
- (1) X-rays
- (2) Radio waves
- (3) Gamma rays
- (4) Visible light
- (5) Infrared radiation
- (6) Ultraviolet radiation

2. **Understand the Order of Frequencies**:
- The frequency of electromagnetic waves increases from radio waves to gamma rays. The general order from lowest to highest frequency is:
- Radio waves < Infrared radiation < Visible light < Ultraviolet radiation < X-rays < Gamma rays

3. **Rank the Waves**:
- Based on the order of frequencies established, we can now rank the electromagnetic waves:
- Radio waves (2) - Lowest frequency
- Infrared radiation (5)
- Visible light (4)
- Ultraviolet radiation (6)
- X-rays (1)
- Gamma rays (3) - Highest frequency

4. **Write the Final Order**:
- The correct order of increasing frequency is:
- 2 (Radio waves) < 5 (Infrared radiation) < 4 (Visible light) < 6 (Ultraviolet radiation) < 1 (X-rays) < 3 (Gamma rays)

5. **Conclusion**:
- Therefore, the list correctly ranking the electromagnetic waves in order of increasing frequency is:
- 2, 5, 4, 6, 1, 3

### Final Answer:
The correct answer is: **2, 5, 4, 6, 1, 3**

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