One half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations.

Options

A. disappear
B. remain almost unaffected
C. have its size reduced to half
D. have its intensity reduced to half.

Explanation

To answer the question of whether a convex lens covered with black paper on one half will produce a complete image of an object, we can follow these steps:

### Step 1: Understanding the Setup
- We have a convex lens and an object placed in front of it.
- Half of the lens is covered with black paper, blocking light from passing through that section.

### Step 2: Analyzing Light Rays
- A convex lens works by bending light rays that pass through it.
- Normally, light rays from every point of the object pass through the lens and converge to form an image on the other side.

### Step 3: Observing Ray Behavior
- Even with half of the lens covered, light rays from the object will still pass through the uncovered half of the lens.
- Since the lens is convex, it can still bend and focus the rays that pass through the uncovered section.

### Step 4: Image Formation
- The image is formed by the convergence of light rays from all points of the object.
- Although only half of the lens is used, the rays from the object will still converge to form a complete image.

### Step 5: Intensity of the Image
- The intensity of the image may be reduced because only half of the lens is collecting light.
- Therefore, the image will be less bright compared to when the entire lens is used.

### Conclusion
- The convex lens covered with black paper on one half will produce a complete image of the object, but the brightness of the image will be reduced.

### Experimental Verification
1. Set up a convex lens and an object (like an arrow or a candle).
2. Cover half of the lens with black paper.
3. Observe the image formed on a screen placed behind the lens.
4. Note that the image is complete but less bright than when the entire lens is uncovered.

### Observations
- The image remains complete, confirming that the lens can still focus light from the uncovered half.
- The intensity of the image is lower, as expected.

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