Which of the following scientist discovered the pressure of visible light?

Options

A. Marconi
B. Hull
C. Nicols
D. Both B and C

Explanation

To solve the question of which scientist discovered the pressure of visible light, we can follow these steps:

### Step 1: Understand the Concept of Light Pressure
Light consists of particles called photons. When these photons strike a surface, they exert a force, which results in pressure. This phenomenon is known as light pressure.

### Step 2: Identify the Scientists Mentioned
The question provides four options:
- A) Marconi
- B) Hull
- C) Nicholas
- D) Both B and C

### Step 3: Recall Historical Contributions
To answer the question, we need to recall which scientists are associated with the discovery of light pressure. Hull and Nicholas are known for their contributions in this area.

### Step 4: Analyze the Options
- Marconi is primarily known for his work in radio waves and telecommunications, not light pressure.
- Hull and Nicholas are both associated with the discovery of light pressure.

### Step 5: Select the Correct Option
Since both Hull and Nicholas contributed to the discovery of light pressure, the correct answer is option D) Both B and C.

### Final Answer
The scientists who discovered the pressure of visible light are Hull and Nicholas. Therefore, the correct option is D) Both B and C.

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