Physics Past Questions and Answers

The fundamental property of a propagating wave which depends only on the source and not the medium of propagation is the?

I. Total internal reflection of light.
II. Conservation of light energy.
III. Relative motion of the earth, sun and moon.
IV. Rectilinear propation of light.
which of the above is a phenomenon of total solar eclipse?

An object of height 4cm is placed in front of a cuboid pinhole camera of size 6 cm. if the image formed is 2 cm high, how far is the object from the pinhole?

An object of heights 5 cm is placed at 20 cm from a concave mirror of focal length 10 cm. the image height is?

Convex mirror are used as driving mirrors because images formed are?