Electromagnetic Waves

The transverse vibrations of a string are determined by Melde's method.
The frequency of vibration of a string of length l, mass per unit length m and vibrating in p loops under tension T is given by



or
If n, l and m are constant.
Hence,


or

or



So, weight removed from the pan

Let and represent the intensities of reflected and incident waves respectively, then

where

There are several factors which affect the propagation of sound. These are geometric spreading, atmospheric effect and surfaces effects. There are two mechanisms by which acoustic energy is absorbed by the atmosphere. These are molecular relaxation and viscosity effects. The amount of absorption depends on the temperature and humidity of the atmosphere.

For end correction ,

Step 1: Fringe position formula.
In YDSE, the position of the -th bright fringe is given by:

Step 2: Ratio of fringe positions.
For the same experimental setup and same fringe order,

Step 3: Substitute wavelength values.

Step 4: Numerical evaluation.

Step 5: Conclusion.
The ratio is nearly .

Step 1: Formula for Antenna Length.
The length of an antenna required to transmit a signal of frequency is given by the formula: where is the velocity of light and is the frequency. Substituting the values: Step 2: Final Answer.
Thus, the length of the antenna required is 50 cm.