While john is traveling along a straight interstate highway, he notices that the mile marker reads 241 km. john travels until he reaches the 134 km marker and then retraces his path to the 167 km marker. what is john’s resultant displacement from the 241 km marker?

Displacement of john will be 74 km                  

Explanation:

We have given that firstly john notice that mile marker reads 241 km

Then he go to 134 km km marker and then return back to 167 km marker point

We know that when we deal with displacement then we consider only initial and final point we don't consider total path traveled

Here initial point is 241 km marker and final point is 167 km marker

So displacement will be 241 - 167 = 74 km

correct it is c.) b b

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle  

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.