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Pinhole Camera Video Lecture | Science (Curiosity) Class 7 - New NCERT

FAQs on Pinhole Camera Video Lecture - Science (Curiosity) Class 7 - New NCERT

1. What is a pinhole camera and how does it work?

Ans. A pinhole camera is a simple type of camera that uses a small aperture (or pinhole) instead of a lens to project an image. Light from the scene passes through the pinhole and creates an inverted image on the surface opposite the pinhole, usually a photosensitive material or screen. The basic principle relies on the fact that light travels in straight lines.

2. What materials do I need to make a pinhole camera?

Ans. To make a pinhole camera, you will need a cardboard or wooden box, a piece of thin metal or foil to create the pinhole, tape, scissors, and photographic paper or film to capture the image. Optionally, you can use a small piece of glass or clear plastic to cover the pinhole if you want to protect it from dust.

3. Why is the image produced by a pinhole camera inverted?

Ans. The image produced by a pinhole camera is inverted because light rays cross as they pass through the pinhole. The rays from the top of the object enter the pinhole and project onto the bottom of the image surface and vice versa for the bottom rays, resulting in an upside-down image.

4. What are the advantages and disadvantages of using a pinhole camera?

Ans. Advantages of a pinhole camera include its simplicity, low cost, and the ability to create a soft focus image. Disadvantages include longer exposure times due to the small aperture, lower image quality compared to camera lenses, and the inability to focus on specific subjects.

5. How can I improve the image quality of my pinhole camera?

Ans. To improve the image quality of a pinhole camera, you can use a smaller pinhole for sharper images, ensure that the camera is stable during exposure to reduce blurriness, and use high-quality photographic paper or film. Additionally, experimenting with exposure times can help achieve better results.

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Sep 02, 2025 Last updated

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	Science (Curiosity) Class 7 - New NCERT 80 videos\|319 docs\|12 tests

Science (Curiosity) Class 7 - New NCERT

80 videos|319 docs|12 tests

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