Advertisements
Advertisements
प्रश्न
Name the phenomenon which shows the quantum nature of electromagnetic radiation.
Advertisements
उत्तर
Photoelectric effect is the phenomenon which shows the quantum nature of electromagnetic radiation.
संबंधित प्रश्न
A radio can tune in to any station in the 7.5 MHz to 12 MHz band. What is the corresponding wavelength band?
The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation,
(a) the intensity increases
(b) the minimum wavelength increases
(c) the intensity remains unchanged
(d) the minimum wavelength decreases.
A certain element emits Kα X-ray of energy 3.69 keV. Use the data from the previous problem to identify the element.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Name the scientist who discovered Microwaves
Answer briefly.
Give two uses of radio waves.
A car is moving towards a high cliff. The car driver sounds a horn of frequency f. The reflected sound heard by the driver has a frequency 2f. If v be the velocity of sound, then the velocity of the car, in the same velocity units, will be:
The area to be covered for T.V telecast is doubled then the height of transmitting antenna (T.V tower) will have to be:-
The ratio of contributions made by the electric field and magnetic field components to the intensity of an EM wave is ______.
Why does microwave oven heats up a food item containing water molecules most efficiently?
Which set lists uses of microwaves?
