State the huygens-fresnel principle. (b) what device is used to collect the data in this experiment? (c) plane waves are incident on a slit whose width is adjustable. the slit starts out on wavelength wide and increases to a width of 1000 wavelengths. describe qualitatively the change in the diffraction pattern.

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.

Why don't you see your reflection in water with waves or repples