What is a transmitter ?

If reflectance of a surface is 0.4 and absorptance is 0.2. What is the transmittance of the surface

What are the components of a transmitter ?

If reflectance of a surface is 0.4 and absorptance is 0.2 what is the transmittance of the surface?

A radio transmitter at position A operates at a wavelength of 20 m . A second , identical transmitter is located at a distance x from the first transmitter , at position B . The transmitters are phase locked together such that the second transmitter is lagging pi//2 out of phase with the first . For which of the following values of BC - CA will the intensity at C be maximum .

A radio transmitter at position A operates at a wavelength of 20 m . A second , identical transmitter is located at a distance x from the first transmitter , at position B . The transmitters are phase locked together such that the second transmitter is lagging pi//2 out of phase with the first . For which of the following values of BC - CA will the intensity at C be maximum .

Which of the following is a neuro transmitter ?