Light of wavelength `6000 Å` falls on a plane reflecting surface. The reflected wavelength is.

Options

A. `6000 Å`
B. `lt 6000 Å`
C. `gt 6000 Å`
D. cannot say

Answer

To solve the problem of finding the reflected wavelength when light of wavelength `6000 Å` falls on a plane reflecting surface, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Nature of Reflection**:
- When light reflects off a surface, the wavelength of the light does not change. This is different from refraction, where the wavelength can change depending on the medium.

2. **Identify the Given Wavelength**:
- The incident light has a wavelength of `6000 Å`.

3. **Apply the Reflection Principle**:
- Since the wavelength does not change upon reflection, the reflected wavelength will be the same as the incident wavelength.

4. **Conclude the Reflected Wavelength**:
- Therefore, the reflected wavelength is also `6000 Å`.

### Final Answer:
The reflected wavelength is `6000 Å`.

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