Rays of light travel in a straight line.This phenomenon is called
total internal reflection
rectilinear propagation
scattering of light
none of these
Spectacle glass is _________.
Opaque object
Transparent object
Translucent object
Partially transparent object
Choose the correct answer
The Earth takes ________ to complete one rotation.
365 days
24 hours
6 month
3 month
_____________ is not considered as a planet.
Neptune
Venus
Pluto
Earth