Wavelength of red light = 650 nm
Here the unit is nanometer, nano means 10⁻⁹
And wavelength of water = 2m
1 nanometer = 10⁹ meter
So, 2 meter = 2 x 10⁹ nm and 650nm = 6.5 x 10⁻⁷ m
now you can see the difference how much wavelength of water is bigger than wavelength of red light.
if we find the difference between them
650 nm= .00000065 m
2m - .00000065m = 1.99999935
so, the water wave is ~1.99999935 meters larger than the red light wave
To solve this problem we will apply the concepts related to the balance of forces. We will decompose the forces in the vertical and horizontal sense, and at the same time, we will perform summation of torques to eliminate some variables and obtain a system of equations that allow us to obtain the angle.
The forces in the vertical direction would be,
The forces in the horizontal direction would be,
The sum of Torques at equilibrium,
The maximum friction force would be equivalent to the coefficient of friction by the person, but at the same time to the expression previously found, therefore
Replacing,
Therefore the minimum angle that the person can reach is 46.9°
I'm pretty sure it's D. negative acceleration
Answer:
If its twice as far the light will be twice as bright.
Explanation: