Podcast
Questions and Answers
What is the orientation of the image formed by a pinhole camera?
What is the orientation of the image formed by a pinhole camera?
What happens to the image when the size of the pinhole increases?
What happens to the image when the size of the pinhole increases?
What is the advantage of a pinhole camera in terms of focusing?
What is the advantage of a pinhole camera in terms of focusing?
What is the reason for covering a pinhole camera with black cloth?
What is the reason for covering a pinhole camera with black cloth?
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What type of shadow is formed when an object is placed in the path of light from a point source?
What type of shadow is formed when an object is placed in the path of light from a point source?
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What occurs when the moon comes between the sun and the earth?
What occurs when the moon comes between the sun and the earth?
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Study Notes
Properties of Images Formed by a Pinhole Camera
- Image is diminished in size
- Image is inverted
- Image is real
- Image is not laterally inverted
- Image gets blurred as the size of the pinhole increases
Advantages of Pinhole Camera
- Infinite depth of focusing, resulting in clear images regardless of object distance
- No need for focusing adjustments
Disadvantages of Pinhole Camera
- Image formation takes a long time due to limited light entering the small pinhole
- Camera must be covered with black cloth to prevent light from entering through sides and edges
Formation of Shadows
- Opaque objects block light, resulting in darkness behind them
- Two types of shadows:
- Umbra: complete or total shadow formed when an object is placed in the path of light from a point source
- Penumbra: partial or incomplete shadow formed when an obstacle is placed in front of light from an extended source or distant source
Eclipse
- Occurs when the moon comes between the sun and earth or when the earth comes between the sun and the moon
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Description
Test your knowledge of the properties of images formed by pinhole cameras, including the advantages and disadvantages of using pinhole cameras. Learn about the characteristics of images formed and the benefits of pinhole cameras, including infinite depth of focusing and no need for adjustments.
