3 years ago

Prisms separate light, such as that from the Sun, by wavelength

Physics

1 answer:

SVETLANKA909090 [29]3 years ago

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Sorry I'm so late, but I just took this test and the answer is white (for people who didn't study well ;) )

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Question 20

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Answer:

The image distance is 17.56 cm

Explanation:

We have,

Height of light bulb is 3 cm.

The light bulb is placed at a distance of 50 cm. It means object distance is, u =-50 cm

Focal length of the lens, f = +13 cm

Let v is distance between image and the lens. Using lens formula :

$\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{f}+\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{13}+\dfrac{1}{(-50)}\\\\v=17.56\ cm$

So, the image distance is 17.56 cm.

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Through Newton’s third law of motion, we know that if a rocket ship pushes down on the ground, the ground will push back up on t

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Thalia is drafting a plan to move a large, perfect sphere concrete sculpture that is in front of her office building. Describe t

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Answer:

table 1:

1. 100/15 = 6.7 m/s

2. 100/12 = 8.3 m/s

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2. 100/6 = 16.7 m/s

3. 100/4 = 25 m/s

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