Astar’s light is alternately shifted from the blue part of the light spectrum to the red part.
what does this mean about the length of light waves and movement of the star?
a.
the wavelengths are getting shorter then longer, meaning the star is moving away from the observer.
b.
the wavelengths are getting shorter then longer, meaning the star is moving toward the observer.
c.
the wavelengths are getting shorter then longer, meaning the star is revolving around another unseen object.
d.
the wavelengths are getting shorter then longer, meaning the star is rotating rapidly.

Is the alien theory a scientific claim? why or why not? just took the test it was , : " the alien theory is not a scientific claim because it is not based on valid data, there is no evidence to support it, and it does not come from a reliable source."

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?