What is the power of a glass plate.

A plano -concave lens is made of glass of refractive index 1.5 and radius of curvature of its curved face is 100 cm . What is the power of the lens ?

What is the power and focal length- of a parallel glass slab?

A plano-concave lens is made of glass of refractive index 1.5 an the radius of curvature of its curved surface is 50 cm. What is the power of the lens?

What is power alcohol?

What is power alcohol?

A thin glass plate is placed in between a convex mirror of focal length 20cm and a point source. The distance between the glass plate and the mirror is 5cm. The image formed by the reflected rays from the front face of the glass plate and that due to the reflected rays by the convex mirror coincide at the same point. What is the distance of the glass plate from the source? Draw the ray diagram.

What is the function of second plate in parallel - plate capacitor?