Tyndall effect is observed when :

a) The ‘d’ of D.P. ‘X’ of light used b) The intensity of scattered light depends on difference between refractive indox of DP & DM.c) In tyophillic colloids, the difference is appreciable and hence, they show tyhdal effect (T.E) d) In tyophillic colloids the difference is very small and hence T.E. is very less.e) difference in R.I of DP & DM