Which of the following types of wave has the given characteristics?

i) The wave travels in a straight line from transmitting antenna to the receiving antenna.

ii) It is used for line-of-sight communication.

What is the bandwidth of video signal required for the transmission of pictures?

What is the correct value of the wavelength of the fourth spectral line (£51) in the Lyman series of the hydrogen spectrum?

If 0.8m is the distance between the two insulated charged spheres of charges 8.5 x10‘7 C each, then what is the force when the charges are doubled and the distance of separation among them is halved?

In a Young's experiment, 3 mm is the width of the fringes obtained with light having a wavelength of 9000 A. If the entire apparatus is immersed in a liquid of refractive index 1.33, then what is the fringe width?

The radius of the nucleus is smaller than the radius of an atom by which of the following factors?

Very small organisms, like paramecia or protozoa, moving around in water __________.

The ________ respects the new conductor.

Restless tectonic plates move (shift) between one and fifteen centimeters per __________.

Stern observed all of the following results except _______ in his experiment.

A compass in a magnetic field will line up __________.