Science
(i) Explain why the refractive index of any material with respect to air is always greater 1.
(ii) In the figure below a light ray travels from air into the semi-circular plastic block. Give a reason why the ray does not deviate at the semi-circular boundary of the plastic block.
(iii) Complete the ray diagram of the above scenario when the light ray comes out of the plastic block from the top flat end.
Related Questions
We are advised to take iodised salt in our diet by doctors. Justify it's importance in our body.
What is the probability of a girl or a boy being born in a family? Justify your answer.
(i) State the law that explains the heating effect of current with respect to the measurable properties in an electrical circuit.
(ii) List the factors on which the resistance of a conductor depends.
Anannya responded to the question: Why do electrical appliances with metallic bodies are connected to the mains through a three pin plug, whereas an electric bulb can be connected with a two pin plug?
She wrote: Three pin connections reduce heating of connecting wires.
(i) Is her answer correct or incorrect? Justify.
(ii) What is the function of a fuse in a domestic circuit?