(a) State two factors which affect the angle of deviation of a ray of light through a triangular glass prism. (b) Seven virtual images of an object are formed when two plane mirrors are inclined at an angle 0 to each other. Calculate the value of 0. (c) By means of a ripple tank, a student was able to generate series of transverse waves by varying the frequency of the dipper and all the waves so generated covered a distance of 0.80 m in 0.2s. (i) Determine the speed, v, of the waves.
Copy and complete the table given in your answer booklet. (iii) Plot a graph with f on the vertical axis and \(\lambda ^{-1}\) on the horizontal axis. (iv) What does the slope of the graph represent?
Explanation
(a) Factors that affect angle of deviation: - angle of incidence - refracting angle of the prism - refractive index of the prism material. (b) N = \(\frac{360}{\theta}\) = 1 7 = \(\frac{360}{\theta}\) = 1 \(\theta = 45^o\) (c) V = s/t = \(\frac{0.8}{0.2}\) = 4 m/s (ii)
