Aplano-convex glass lens of radius of curvature 1.6 m rests on an optically flat glass plate. the arrangement is illuminated from above with monochromatic light of 572-nm wavelength. the indexes of refraction of the lens and plate are 1.6. determine the radii of the first and second bright fringes in the reflected light.
first bright fringe: in meters and second bright fringe as well

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Which one of the following research methods can show cause and effect