which of the following wavebands is used by thermal imaging devices and has a wavelength about the width of a human hair?

microwaves
radio waves
ultraviolet waves
infrared waves

If the radius of curvature of the cornea is 0.75 cm when the eye is focusing on an object 36.0 cm from the cornea vertex and the indexes of refraction are as described before, what is the distance from the cornea vertex to the retina? express your answer to two significant

Lightning is an example of what phenomenon? a release of a large amount of energyan absorption of a large amount of energya natural electric circuita natural electric current

What is the increase in density of a medium due to wave travel?