The closely packed cones in the fovea of the eye have a diameter of about 2 micrometers. For the eye todiscern two images on the fovea as distinct, assume that the images must be separated by at least onecone that is not excited. If these images are of two point-like objects at the eye’s 25-cm near point, howfar apart are these barely resolvable objects? Assume the diameter of the eye (cornea-to-fovea distance)is 2.0 cm.

If the speed of a particle triples ,by what factor does its kinetic energy increase?

How do you tell if someone actually cares about you? and just say they do?

Some material consisting of a collection of microscopic objects is kept at a high temperature. a photon detector capable of detecting photon energies from infrared through ultraviolet observes photons emitted with energies of 0.3 ev, 0.5 ev, 0.8 ev, 2.0ev, 2.5ev, and 2.8ev. these are the only photon energies observed. (a) draw and label a possible energy-level diagram for one of the microscopic objects, which has four bound states. on the diagram, indicate the transitions corresponding to the emitted photons. explain briefly. (b) would a spring–mass model be a good model for these microscopic objects? why or why not? (c) the material is now cooled down to a very low temperature, and the photon detector stops detecting photon emissions. next, a beam of light with a continuous range of energies from infrared through ultraviolet shines on the material, and the photon detector observes the beam of light after it passes through the material. what photon energies in this beam of light are observed to be significantly reduced in intensity (“dark absorption lines”)? explain briefly.