Determine whether each statement concerning different wavelengths of light is true or false.

Light with a wavelength of 100 nm is completely absorbed by the atmosphere.
Light with a wavelength of 400 nm has the color of red.
Light with a wavelength of 280 nm is in the ultraviolet region.

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?