The electromagnetic waves do not transport. 

Correct option is  C) Visible rays

Correct option is: (D) 10.0 m/s

1. SI unit of frequency of electromagnetic waves is hertz (Hz). 2. Higher frequencies are represented by kHz, MHz, GHz etc. [Note: 1 kHz = 103 Hz, 1 MHz = 106 Hz. 1 GHz =...

1. The SI unit of wavelength of electromagnetic waves is metre (m). 2. Small wavelengths are represented by micrometre (µm), angstrom (Å), nanometre (nm) etc. [Note: l A = 1010 m = 10-8 cm, 1...

In communication using radio waves, an antenna in the transmitter radiates the EM waves, which travel through space and reach the receiving antenna at the other end.

Correct option is: (C) radio waves

The correct option is (B) 4 : 1. I1 = 1 I2 = 9 Imax = (√I2 + √I1)2 Imin = (√I2 - √I1)2 \(\frac{I_{max}}{I_{min}}=\frac{(\sqrt{I_2}+\sqrt{I_1})^2}{(\sqrt I_2-\sqrt I_1)^2}\) \(\frac{I_{max}}{I_{min}}=\frac{(\sqrt{9}+\sqrt{1})^2}{(\sqrt 9-\sqrt 1)^2}\)  \(\frac{I_{max}}{I_{min}}=\frac{(3+1)^2}{(3-1)^2}\)  \(\frac{I_{max}}{I_{min}}=\frac{(4)^2}{(2)^2}\)  \(\frac{I_{max}}{I_{min}}=\frac{16}{4}\)  \(\frac{I_{max}}{I_{min}}=\frac4{1}\) 

B) longitudinal

1. False 2. True 3. False 4. True

Correct Answer - b d