I. Total internal reflection of light.
II. Conservation of light energy.
III. Relative motion of the earth, sun and moon.
IV. Rectilinear propagation 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?

An object placed at the bottom of a well full of clear water appears closer to the surface due to?