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Gekata [30.6K]
2 years ago
8

Ultraviolet rays from the sun are able to reach Earth's surface because A. They require air to travel through B. They have less

energy than infrared rays C. They have lower frequencies than visible light D. They can travel through empty space
Physics
1 answer:
9966 [12]2 years ago
3 0
Yeah, because of it's short frequencies, ultraviolet rays can travel through empty space- D
: D
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The closest distance a book can be read from a pair of reading eyeglasses (Power = 1.55 dp) is 26.0 cm. What is the near distanc
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Answer:

The image distance is 20.0 cm.

Explanation:

Given that,

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f = \dfrac{1}{P}

Put the value into the formula

f=\dfrac{1}{1.55}

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Using lens formula

\dfrac{1}{f}=\dfrac{1}{u}+\dfrac{1}{v}

\dfrac{1}{v}=\dfrac{1}{f}-\dfrac{1}{-u}

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\dfrac{1}{v}=\dfrac{1}{64.5}-\dfrac{1}{-29}

\dfrac{1}{v}=\dfrac{187}{3741}

v=20.0\ cm

Hence, The image distance is 20.0 cm.

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