[" (4) incidence of the the "],[" What is immunisation? "]

Which of the following is passive immunisation ?

Which of the following is passive immunisation ?

What is incidence angle ?

What is Vaccination and Immunisation ?

Answer any three of the following (restrict each answer 2 to 3 important sentences). What is immunisation?

Purpose of Immunisation is

Vaccination And Immunisation

What is the angle of incidence of a ray if the reflected ray is at an angle of 90^@ to the incident ray ?

What is the angle of incidence of a ray if the reflected ray is at an angle of 90^@ to the incident ray?