The dye in between the two pieces of glass in the filter absorbs all the other colors in the white light except the red, and the red is the only light left to come out the other side. That's why the filter usually looks kind of red. It's also a big part of the reason why we call it a "red filter".
Answer:
7.69km/hr due east
Explanation:
Given parameters:
Displacement due west = 3km
Displacement due east = 2km
Time taken = 8 minutes
Unknown:
Average velocity = ?
Solution:
Average velocity is the rate of change of displacement with time.
Velocity = 
Displacement is deals with the start and the end;
Here, displacement = 3km - 2km = 1km due east
Time = 8min
60min = 1hr
8min = 
= 0.13hr
Average velocity = 
= 7.69km/hr due east
It seems that you have missed the given options for this question, but anyway, here is the correct answer. If humans cannot see ultraviolet waves, ultraviolet light can be used to gather evidence of a crime since u<span>ltraviolet light causes substances to fluoresce and give off visible light. Hope this is the answer that you are looking for. Thanks for posting!</span>
Answer:
L=55.9m
Explanation:
The equation for the period of a simple pendulum is:
In our case what we know is the period and the acceleration of gravity, and we need to know the length of the pendulum, so we can write:
Which for our values is:
A light that is 3.98 times the distance from its source will have an intensity of 15.8404W/m^2
<h3>Calculation of light intensity</h3>
The relationship between the distance of light and intensity is that intensity varies inversely with the square of the distance from the source.
That is to say,if the distance of light is increased by 3.98 times, the light intensity is decreased by square of 3.98.
Therefore, the intensity is 3.98² = 15.8404W/m^2
Learn more about light intensity here:
brainly.com/question/2114560
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