Speed of light is maximum in..............
Sun appears red in colour at sunrise and sunset due to
Temperature of distant luminous bodies can be determined by
What is the value of the Least Distance of Distinct vision (in cm) for a normal human being?
A body moving in a circular path with a constant speed has a ........
Flemings, "Left hand Rule" is associated with the effect of
The angle between the ........... and the incident ray is called the angle of incidence.
During the motion of a projectile fired from the earth surface....
On the Moon, an astronaut cannot drink lemonade with the help of straw because
Which of the following is not true about X-rays?