A narrow, monochromatic beam of light has a wavelength in a vacuum of 0.3.10^-12m A. determine the period, frequency of that light in a vacuum
B. calculate the speed and wavelength of that light as it travels through a transparent medium with a refractive index of 1.2

Which type of microscope would allow the viewer to see ribosomes inside a cell?

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)

Which missing item would complete this alpha decay reaction ? > 228/88ra + 4/2he a.224/96 rn b. 232/90 th c. 230/92 u d. 235/92 u