(a) Draw ray – diagrams to show the formation of image when the object is placed in front of a concave mirror (converging mirror): (i) Between its pole and focus (ii) Between its centre of curvature and focus. Describe the nature, size and position of the image formed in each case. (b) State the use of a concave mirror based on the formation of images as in case above.

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?