Explanation:
what happens is that light slows down when it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction. It is the change in the speed of the light that causes refraction.
cos(A) = (b2 + c2 − a2) / 2bc = (16+6.5^2-3.5^2)/(2*4*6.5) = 0.88461538 so A = cos−1 (0.88461538) = 27.79 Deg
cos(B) = (c2 + a2 − b2)/2ca = (3.5^2+6.5^2-16)/(2*3.5*6.5) = 0.84615385 so B = cos−1 (0.84615385) = 32.2 Deg
Sound waves are mechanical waves so they need a medium for propagation.
Explanation:
The most fundamental properties of sound waves are:-
1. Wavelength
2. Frequency
3. Amplitude
Gateway is what controls what enters and exits the cell
It’s by making baby’s with baby boomers
