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grin007 [14]
3 years ago
13

When you look at green dots with a red filter what color did you see?

Physics
1 answer:
Dimas [21]3 years ago
3 0
-- Looking at the dots casually, they look green because they absorb all other
colors of light, and only green light is left to proceed to your eyes. (In order for
this to work, there has to be some green in the light shining on the dots.
Daylight and most light bulbs work fine.)

-- The filter looks red because it absorbs all other colors of light, and only
the red light is left to pass through the filter and come out on the other side.

-- When the green light from the dots hits the red filter, it's absorbed in the
filter, and there's no light left to come out on the other side.

If you're looking through the filter at the dots, they look <em>black</em>.

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If you increase the frequency of a sound wave four times what will happen to its speed
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Answer: The correct answer is "the speed of the wave becomes four times".

Explanation:

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The speed of the sound wave is directly proportional to the frequency.

In the given problem, if the speed of the sound wave is increased four times then the speed of the sound becomes four times.

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8 0
3 years ago
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Answer:

E = 9.66\times 10^{-6} N/C

direction is Horizontal

Explanation:

As we know that the string is horizontal here

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now we will have

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so here the force is tension force on it

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Q = 6.80 \times 10^3 C

now we have

6.57 \times 10^{-2} = (6.80 \times 10^3)E

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4 0
3 years ago
Why are SI units used for scientific works ?​
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