Question
A soap bubble shows colours when illuminated with white
light. This is due to –Solution
The iridescent colours of soap bubbles are caused by interfering of (internally and externally) reflected light waves and are determined by the thickness of the film. This phenomenon is not the same as the origin of rainbow colours (caused by the refraction of internally reflected light), but rather are the same as the phenomenon causing the colours in an oil slick on a wet road.
Who is Grandson of O?
Answer the questions based on the information given below.
Nine persons G, K, M, F, H, J, I, N and L are there in the family of three generat...
P is the brother of Q. S is the father of P. R is the brother of S. If T is the mother of R, then how is P related to T?
How is the mother of J related to the daughter of H?
How is P related to M’s son?
How is S related to Z?
How many daughters Ajay and Rekha have?
...Answer the questions based on the information given below.
Seven persons (S, T, U, V, W, Y and Z) belong to a family of three generations. No s...
How is G related to H?
If V is married to M then how is V related to the daughter of H?
