A spherical mirror produces an image of magnification -1 on a screen placed at a distance of 50cm from the mirror. a) Write the type of mirror. b) Find the distance of the object from the mirror. c) What is the focal length of the mirror? d) Draw the ray diagram to show the image formation of this case.

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?