Physics
(a) Define convex lens and give its nature of refraction.
(b) A 6 cm tall object is placed perpendicular to the principal axis of convex lens of focal length 25 cm. The distance of the object from the lens is 40 cm.
By calculation determine
the position and
the size of the image formed.
Related Questions
You are provided with a printed piece of paper. Using this paper, how will you differentiate between a convex lens and concave lens?
(b) What are the uses of convex lens?
(a) How many surfaces bound a prism?
(b) Give the relationship between wavelength of light and amount by which it deviates when it is passed through a prism.
(c) What will be the colour of the emergent light ray when a ray of white light is incident on a thin walled hollow glass prism?
A pulley system with V.R. = 4 is used to lift a load of 175 kgf through a vertical height of 15 m. The effort required is 50 kgf in the downward direction. (g = 10 N kg-1)
Calculate:
(i) Distance moved by the effort.
(ii) Work done by the effort.
(iii) M.A. of the pulley system.
(iv) Efficiency of the pulley system.
(a) How a beam balance comes to static equilibrium?
(b) How a plane moves at a constant height? On which fact it is based?