A 1-kW radio frequency of 880 KHz. How many quantas per second does it emit?

Correct answer: B. 1.71 x 10^30

  • A. 1.71 x 10^21
  • B. 1.71 x 10^30
  • C. 6.02 x 10^23
  • D. 2.85 x 10^26

Explanation

Convert the power to watts:The transmitter's power is given as 1 kW, which is equal to 1000 watts (W). 2. Convert the frequency to hertz:The frequency is given as 880 kHz, which is equal to 880,000 Hz or 880×103 Hz. 3. Calculate the energy of a single photon:The energy of a photon is given by the formula: E=hν, where:E is the energy of the photon. h is Planck's constant, which is approximately 6.626×10−34 J·s. ν is the frequency of the radiation. Therefore:$E = (6.626 \times 10^{-34} \text{ J·s}) \times (880 \times 10^3 \text{ Hz})$E≈5.83088×10−28 J4. Calculate the number of photons emitted per second:The number of photons emitted per second is equal to the total power of the transmitter divided by the energy of a single photon.Number of photons/second = Power / Energy per photon.Number of photons/second = 1000 W/(5.83088×10−28 J)Number of photons/second ≈1.71499×1030Therefore, the radio transmitter emits approximately 1.71×1030 photons per second.

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