With both light and sound show wave character, diffraction is much harder to observer in light. This is because

Options

A. wavelength of light is smaller
B. waves of light are transverse
C. speed of light is far greater
D. light does not require any medium

Answer

To solve the question, we need to understand the concept of diffraction and how it relates to the wavelength of waves, specifically comparing light and sound waves.

### Step-by-Step Solution:

1. **Understanding Diffraction**:
- Diffraction is the bending of waves around obstacles and the spreading of waves when they pass through small openings. It is a characteristic behavior of all waves, including sound and light.

2. **Wavelength Comparison**:
- The extent of diffraction is significantly influenced by the wavelength of the waves. Generally, longer wavelengths lead to more pronounced diffraction effects, while shorter wavelengths result in less noticeable diffraction.

3. **Wavelength of Sound vs. Light**:
- Sound waves have relatively long wavelengths (for example, in air, sound can have wavelengths on the order of meters), while light waves have much shorter wavelengths (ranging from about 400 nm to 700 nm).

4. **Conclusion on Observability of Diffraction**:
- Since the wavelength of light is much smaller than that of sound, the diffraction effects in light are less pronounced and harder to observe. This is the primary reason why diffraction is more easily observed in sound than in light.

5. **Identifying the Correct Option**:
- Given the options:
- A) Wavelength of light is smaller
- B) Waves of light are transverse
- C) Speed of light is far greater
- D) Light does not require any medium
- The correct answer is **Option A**: "Wavelength of light is smaller."

### Final Answer:
The reason diffraction is much harder to observe in light compared to sound is that the wavelength of light is smaller.

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