What was used to detect the radio waves?

Which of the following is used to produce radio waves of constant amplitude?

A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condense of capacity 250 picofarad in parallel with a load resistance 100 kilo ohm find the maximum modulated which could be find the maximum modulated frequency which could be detected by it

Electromagnetic waves with wavelength (i) lambda_(1) is used in satellite communication. (ii) lambda_(2) is used to kill germs in water purifies. (iii) lambda_(3) is used to detect leakage of oil in underground pipelines. (iv) lambda_(4) is used to improe visibility in runways during fog and mist conditions. Write one more application of each.

Electromagnetic waves with wavelength (i) lambda_(1) is used in satellite communication. (ii) lambda_(2) is used to kill germs in water purifies. (iii) lambda_(3) is used to detect leakage of oil in underground pipelines. (iv) lambda_(4) is used to improe visibility in runways during fog and mist conditions. Arrange these wavelengths in ascending order of their magnetude.

Electromagnetic waves with wavelength (i) lambda_(1) is used in satellite communication. (ii) lambda_(2) is used to kill germs in water purifies. (iii) lambda_(3) is used to detect leakage of oil in underground pipelines. (iv) lambda_(4) is used to improe visibility in runways during fog and mist conditions. Identify and name the part of electromagnetic spectrum to which these radiations belong.

Snake can detect which type of waves ?

Write range of frequencies of radio wave.