Hertz
Decibel
Candela
Mach
Which tube used to produce X-ray?
Which type of mirror is used in the head lights of vehicles ?
Which waves cannot be transmitted through vacuum?
While catching a ball, a player pulls down his hands to lower the–
While passing over a suspension bridge, soldiers are not allowed to march in steps. This is
While passing over an obstacle a light ray slightly bends round the corner. The phenomenon is known as_:
White light is made up of seven colours. What is the method of separating the colours?
Who among the following coined the term тАХcosmic raysтАЦ ?
Who among the following discovered the atom bomb -
Who among the following invented the refrigerator?
