Physics equations/25-Geometric Optics/Q:image

pe025OpticsConcepts
{Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates } + how a nearsighted person might see a distant object - how a nearsighted person might see an object that is too close for comfort - how a farsighted person might see an object that is too close for comfort - how a farsighted person might see a distant object { Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates } - how a nearsighted person might see a distant object - how a farsighted person might see a distant object + how a farsighted person might see an object that is too close for comfort - how a nearsighted person might see an object that is too close for comfort {In optics, normal means} - to the left of the optical axis - parallel to the surface + perpendicular to the surface - to the right of the optical axis {The law of reflection applies to} - only light in a vacuum - telescopes but not microscopes - curved surfaces + both flat and curved surfaces - flat surfaces {When light passes from air to glass} - the frequency decreases - the frequency increases - it bends away from the normal + it bends towards the normal - it does not bend {When light passes from glass to air} - it does not bend - the frequency decreases - the frequency increases - it bends towards the normal + it bends away from the normal {An important principle that allows fiber optics to work is} - the invariance of the speed of light + total internal reflection - total external refraction - partial internal absorption - the Doppler shift {The focal point is where} - rays meet whenever they pass through a lens + rays meet if they were parallel to the optical axis before striking a lens - rays meet whenever they are forming an image - rays meet if they are parallel to each other - the center of the lens