A object of height 0.02m is to be enlarged on a screen to a height of 0.8m by means of a converging lens placed 4.0m from the screen. calculate thedistance of the object from the lens. focal length of the lens .

Which accurately compares concave and convex lenses?

In a series circuit the __ is the same at every point

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.