Advertisements
Advertisements
प्रश्न
Choose the correct option.
Earth’s atmosphere is richest in
पर्याय
UV
IR
X-ray
Microwaves
Advertisements
उत्तर
Earth’s atmosphere is richest in IR
APPEARS IN
संबंधित प्रश्न
How are infrared waves produced?
If the earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain.
What is the range of the wavelength of the following electromagnetic waves?
(a) Visible.
Name the region beyond the violet end of the spectrum called.
Name of physical quantity which remains same for microwaves of wavelength 1 mm and UV radiations of 1600 Å in vacuum.
How are X-rays produced?
Which part of electromagnetic spectrum is used in radar systems?
Characteristic X-rays may be used to identify the element from which they are being emitted. Can continuous X-rays be used for this purpose?
Moseley's Law for characteristic X-ray is √v = a(Z − b). Here,
The Kβ X-ray of argon has a wavelength of 0.36 nm. The minimum energy needed to ionize an argon atom is 16 eV. Find the energy needed to knock out an electron from the K shell of an argon atom.
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.)
If the operating potential in an X-ray tube is increased by 1%, by what percentage does the cutoff wavelength decrease?
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
-
- Calculate the speed of the wave.
- Name the medium through which it is traveling.
Give one use of electromagnetic radiation in Microwaves.
Answer briefly.
Why high-frequency carrier waves are used for the transmission of audio signals?
A bat moving at 10 ms−1 towards a wall sends a sound signal of 8000 Hz towards it. On reflection, it hears a sound of frequency f The value of f in Hz is close to (speed of sound = 320 ms−1)
Microwaves are electromagnetic waves with frequency in the range of.
Following QN ∴ 14, the radiation force on the roof will be
SONAR emits which of the following waves?
The electric field intensity produced by the radiations coming from 100 W bulb at a 3 m distance is E. The electric field intensity produced by the radiations coming from 50 W bulb at the same distance is ______.
Electromagnetic waves with wavelength
- λ1 is suitable for radar systems used in aircraft navigation.
- λ2 is used to kill germs in water purifiers.
- λ3 is used to improve visibility in runways during fog and mist conditions.
Identify and name the part of the electromagnetic spectrum to which these radiations belong. Also arrange these wavelengths in ascending order of their magnitude.
Identify the electromagnetic radiation and write its wavelength range, which is used to kill germs in water purified. Name the two sources of these radiations.
Name the electromagnetic radiation whose frequency is 10 Hz.
What happens when an electron collides with a positron?
In \[c = \nu\lambda\], what do \[c\], \[\nu\], and \[\lambda\] represent?
Which group of activities uses radio waves?
Which set lists applications of X-rays?
