Choose the correct statement with respect to Refraction of light

Options

A. The ray of light does not necessarily deviate from its original path
B. The light ray bends away from the normal when density of second medium is less than the first medium
C. Speed of light decreases when it enters from one optical rarer medium to another denser medium due to decrease in wavelength of light wave
D. All of the above

Explanation

To solve the question regarding the correct statement with respect to the refraction of light, we need to analyze each of the provided options step by step.

### Step 1: Analyze the first option
**Statement:** The ray of light does not necessarily deviate from its original path.

- **Explanation:** When light travels from one medium to another, it may or may not change its direction. If the light ray strikes the boundary at a 90-degree angle (perpendicular to the surface), it will continue in a straight line without deviating. Therefore, this statement is true.

### Step 2: Analyze the second option
**Statement:** The light ray bends away from the normal when the density of the second medium is less than the first medium.

- **Explanation:** According to Snell's law, when light travels from a denser medium (higher refractive index) to a rarer medium (lower refractive index), it bends away from the normal. This is because the speed of light increases in the rarer medium. Hence, this statement is also true.

### Step 3: Analyze the third option
**Statement:** The speed of light decreases when it enters from one optically rarer medium to another denser medium due to a decrease in the wavelength of the light wave.

- **Explanation:** When light travels from a rarer medium to a denser medium, its speed decreases because the light interacts more with the particles in the denser medium, leading to more collisions. The wavelength of light also decreases in a denser medium, which is consistent with the relationship between speed, frequency, and wavelength. Thus, this statement is true as well.

### Conclusion
Since all three statements are correct, the overall correct answer is that all of the above options are correct.

### Final Answer
All of the above options are correct.

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