D. Rutherford found that the atom consists of a small positively charged nucleus.
Particles vibrate parallel to the direction the sound travels. It's a longitudinal wave.
Explanation:
A distance-versus-time graph gives the distance an object has traveled after a given time.
In a distance-versus-time graph the slope represents the the speed of the object because
is

And how steep the slope of the distance-versus-time graph is tells us how fast an object is moving; steeper the slope greater the speed. For example, a graph with slope 10 represents a greater speed than a graph with slope 2.
So the steepness of the slope of the distance-versus-time is the speed of the object, and greater the slope greater is the speed.
Answer:
So visible wavelength which is possible here is
416 nm and 693.3 nm
Explanation:
As we know that for normal incidence of light the path difference of the reflected ray is given as

so here we can say that for maximum intensity condition we will have

so we have

now for visible wavelength we have
for N = 1




for N = 2



for N = 3



I’m sorry i haven’t found the answer to this