Question

what must be refractive index of glass if total internal reflection occurs at the vertical face​

Answer 1

Answer:

It may be caused due to the attack of pathogens (virus, bacteria), lack of nutritious diet/balanced diet and lack of public health services. The disease which lasts for only a short period of time is called Acute Disease. For example: Influenza (Flu), Common cold, etc. For example: TB, Cancer, etc

Answer 2

Answer:

I can not understand the question