Which sequence shows electromagnetic waves arranged in a decreasing order of their wavelengths
a. visible light, gamma rays, infrared rays, x-rays, ultraviolet rays
b. infrared rays, visible light, ultraviolet rays, x-rays, gamma rays
c. gamma rays, x-rays, ultraviolet rays, visible light, infrared rays
d. ultraviolet rays, visible light, gamma rays, x-rays, infrared rays

Afisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. it takes a time of 2.70 s for the boat to travel from its highest point to its lowest, a total distance of 0.700 m. the fisherman sees that the wave crests are spaced a horizontal distance of 6.50 m apart. a. how fast are the waves traveling? b. what is the amplitude a of each wave?