Consider the following statement regarding a beam of LASER.
(I) It is highly monochromatic.
(II) It is an electromagnetic radiation from a source.
(III) It travels with the speed of light.
Which of the statements given above are correct?

Options

A. Both I and II
B. Both II and III
C. Both I and III
D. I, II and III

Answer

To solve the question regarding the statements about a beam of LASER, we will analyze each statement one by one.

### Step 1: Analyze Statement I
**Statement I:** "It is highly monochromatic."

- **Explanation:** A LASER beam is known for its monochromatic nature, meaning it consists of light of a single wavelength or color. This is a fundamental characteristic of LASERs, which distinguishes them from ordinary light sources that emit a range of wavelengths.

**Conclusion:** Statement I is correct.

### Step 2: Analyze Statement II
**Statement II:** "It is an electromagnetic radiation from a source."

- **Explanation:** LASER stands for Light Amplification by Stimulated Emission of Radiation. LASERs produce light through the process of stimulated emission, which is a form of electromagnetic radiation. Therefore, it is accurate to say that LASER is a type of electromagnetic radiation.

**Conclusion:** Statement II is correct.

### Step 3: Analyze Statement III
**Statement III:** "It travels with the speed of light."

- **Explanation:** All electromagnetic waves, including LASER light, travel at the speed of light in a vacuum. This is a well-established principle in physics, confirming that LASER light also travels at this speed.

**Conclusion:** Statement III is correct.

### Final Conclusion
Since all three statements (I, II, and III) are correct, the answer to the question is that all statements given above are correct.

### Answer:
All three statements are correct.

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