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docker41 [41]
3 years ago
10

This is a picture of an argon laser. Electrified argon causes the green glow. Where did the argon come from? A. water B. an ore

C. the air D. a mineral
Physics
2 answers:
melamori03 [73]3 years ago
6 0

the correct  answer is 0.636.

Gala2k [10]3 years ago
3 0

Argon come from the air. It is a noble gas present in atmosphere. The percentage of argon in air is about 0.93%. Naturally, it is a colorless and odorless gas. When electrifies it gives a blue-green glow. Argon laser is used in field of medicine and surgery.

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Answer:

The power of top half of the lens is 0.55 Diopters.

Explanation:

Since, the person can see an object at a distance between 34 cm and 180 cm away from his eyes. Therefore, 180 cm must be the focal length of the upper part of lens, as the top half of the lens is used to see the distant objects.

The general formula for power of a lens is:

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Therefore, for the top half of the lens:

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