No.1 Answer the following in short:-(1 sentence)
1) What is light?
2) When does lunar eclipse takes place?
3) What do you mean by source of light?
4) What happen to the image formed in a pinhole camera if the size of the hole is increasd?
5) What is a screw?
Answers
Answer:
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Explanation:
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Answer:
1. Light is a form of electromagnetic radiation with a wavelength which can be detected by the human eye.
2.A lunar eclipse occurs when the Moon moves into the Earth's shadow. This can occur only when the Sun, Earth, and Moon are exactly or very closely aligned (in syzygy) with Earth between the other two, and only on the night of a full moon.
3.A light source is anything that makes light, whether natural and artificial. Natural light sources include the Sun and stars. Artificial light sources include lamp posts and televisions.
4. If the size of the hole in a pinhole camera is as big as the size of a green gram then the sharpness in the image decreases. The image becomes thick and the image is blur. If the size of the hole of a pinhole camera increases then more light enters and disturbs the formation of the image.
5. A screw is a machine and appears like an inclined plane wound around a rod with a pointed tip. For example a jar lid, a drill.
Explanation: