Given below are two statement : one is labelled as Assertion A and the other is labelled as reason R
Asertion A: EM wavws used for optical communicatin have longer wavelenghts than that of microwave, emplyed in Radar technology. Reason R : Infared EM waves are more energetic thanmicrowaves (used in Radar)
In the light of given, statements, choose the correct answer from the options given below.

Options

A. Both A and R are true and r is the correct explanation of A
B. Both A and R are but R is NOT the correct explanation of A
C. A is true but R is false
D. A is false but R is true

Answer

To solve the given question, we need to analyze the two statements: Assertion A and Reason R.

**Assertion A:** "EM waves used for optical communication have longer wavelengths than that of microwaves employed in Radar technology."

**Reason R:** "Infrared EM waves are more energetic than microwaves (used in Radar)."

### Step 1: Analyze Assertion A
- **Understanding EM Waves:** Electromagnetic (EM) waves encompass a wide range of wavelengths, from radio waves to gamma rays.
- **Wavelength Comparison:** Optical communication typically uses light waves, which are in the visible spectrum (approximately 400 nm to 700 nm). Microwaves, used in radar technology, have longer wavelengths (about 1 mm to 1 m).
- **Conclusion on Assertion A:** Since the wavelengths of microwaves are indeed longer than those used in optical communication, Assertion A is **false**.

### Step 2: Analyze Reason R
- **Understanding Energy of EM Waves:** The energy of electromagnetic waves is inversely proportional to their wavelength. This means that shorter wavelengths correspond to higher energy.
- **Wavelengths of Infrared and Microwaves:** Infrared waves have shorter wavelengths than microwaves. Therefore, infrared waves are indeed more energetic than microwaves.
- **Conclusion on Reason R:** Reason R is **true**.

### Step 3: Determine the Relationship Between Assertion and Reason
- **Assertion A is False:** Since Assertion A is false, it cannot be supported by Reason R, regardless of the truth of Reason R.
- **Reason R is True:** Reason R is true but does not explain Assertion A.

### Final Conclusion
- **Both statements are evaluated:** Assertion A is false, and Reason R is true. Therefore, the correct answer is that both statements are true, but R is not the correct explanation of A.

### Answer
The correct option is: Both A and R are true, but R is not the correct explanation of A.

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