Arches NP, UT. Check and double-click the placemark for Problem 7, which flies you to an area on the NE side of Salt Valley that shows two prominent joint sets. Joint sets may intersect at a variety of angles, but most commonly are classified as being at right angles (orthogonal) or not at right angles. Which kind are these? a. right angles (orthogonal)
b. not at right angles

the correct answer is blue and green.

a visible spectrum is electromagnetic spectrum color that can be seen by a normal human being by a single wavelength of light. the visible light spectrum is the range of wavelengths that make up visible light. the visible light spectrum passes through a prism enabling the rainbow reveals all the colors in the spectrum. these range from red, orange, yellow, green, blue and violet.