Total internal reflection occurs when the angle of incidence a. is less than the official angle. is zero c. equals the angle of reflection d. exceeds the critical angle

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

The material that keeps its new shape after it is stretched is called?

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?