For a given incident ray, the plane of the mirror makes

an angle a with the incident ray then reflected ray is

turned through 29. This fact is used in which of the

options given below?

(A) Periscope (B) Kaleidoscope

(C) Shaving mirrors (D) Automobile head lights

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?