Calculate the refractive index of water with respect to glass and refractive index of glass with respect to water, if speed of light in water and glass is 2.2 xx10^(8) m/s and 2xx10^(8) m/s respectively.

What type of questions asked from the lesson of magnetic effect of electric current 

Wavelength of green light is

A) 400-450 nm

B) 500-550 nm

C) 660-720 nm

D) 720-800 nm

What is the difference between anaerobic & aerobic respiration? Name some organism that uses the aerobic mode of respiration?

What are the main components of our environment? Explain each of them briefly.

What are examples of hydrotropism plants?