d and l antenna

When free space is the communication channel, antennas radiate and receiver the signal. Theory shows that the antennas operate effective only when their dimensions are of the order of the magnitude of wavelength of the signal being transmitted...

Communication Systems..

(D) - Glyceraldehyde (L) - Glyceraldehyde In (I) when the OH group is on the right side of the molecule, the notation is Dee. And when the OH group is on the left as in (II) the notation is Ell. For other optically active compounds there are additional..

A, B, C, D are points on a line L as shown. If A′ is the reflection of A in line L, then which of the following is correct? => A′ = C or A′ = A or A′ = B or A′ = D..

. The various sub-levels or sub-shells are also designated by letters s, p, d, f depending upon the values of l as shown belo..

Properties and uses of D.D.T. D.D.T. is almost insoluble in water but it is moderately soluble in polar solvents. It is a powerful insecticide widely used for killing mosquitoes and other insect..

The cholesterol level of healthy men is normally distributed with a mean of 190 mg/dL and a standard deviation of 15. At what level (in excess of 190 mg/dL) should men be diagnosed as not healthy if the probability of a type I error is 2.5%? => 160.6 or 219.4 or 205 or 175..

In this, an individual stimulates other members of the same species by physical contact. Different messages are communicated by varying the frequency, pressure and duration of contact. For e.g., Mutual preening in birds. Grooming in primates/mammals. Ants use contact through antennae..

For 'd' orbitals 'l' = 2. Therefore the angular momentum of an electron does not show a spherical symmetry. For 'l' = 2, five values of 'm' the magnetic quantum number exists i.e., -2, -1, 0, +1, and +1. Accordingly there are five space orientations for 'd' ..

For d-orbital (l = 2), there are five possible orientations corresponding to m = - 2, -1, 0, + 1, +2. This means that there are five orbitals in each d-subshell. For 3d subshell, these are designated as 3d x y , 3d y z , 3d x z ,..