Lens start

An object starts moviing at an angle of 45^(@) with the principal axis as shown in figure. In front of a biconvex lens of focal length +10cm . If theta denotes the angle at which image starts to move with principal axis, then

Thin lens (Part-2)|Power of lens| combination of lens| silvered lens

A man who cannot see clearly beyond 5m wants to see starts clearly. He should use a lens of focal length

Thin lens (Part-1) |Types of thin lens|Nature of lens|Lens displacememt method

What is a lens? Distinguish between a convex lens and a concave lens. Which of the two is a converging lens: convex and lens or concave lens?

A convex lens is a diverging lens.