Which among the given radiations has the highest wavelength and can be used for radio and television communications?
Which of the following is the correct relation between frequency (f), speed (C) and wavelength (λ) of an electromagnetic radiation?
f = λC
C = λf
C = f×λ
f = C×λ
Which ray in Electromagnetic Spectrum is present in cosmic radiation?
Which of the following has the same value for all waves when travelling through vacuum?
Which ray in Electromagnetic spectrum is produced by crystal oscillator?
Vitamin D in plants are produced by which ray in Electromagnetic Spectrum?
Infrared radiations are absorbed by the glass but are transmitted by rock salt.
Light is a form of electromagnetic radiation. Which statement about light waves is NOT true?
It has a varying amplitude.
Its wavelength can vary.
It can pass through the vacuum.
It cannot pass through the vacuum.
An electromagnetic wave has a frequency of 500 MHz and a wavelength of 60 cm, then find the speed of the wave.