Advertisements
Advertisements
प्रश्न
One requires 11eV of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in ______.
विकल्प
visible region.
infrared region.
ultraviolet region.
microwave region.
Advertisements
उत्तर
One requires 11eV of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in ultraviolet region.
Explanation:
Given energy required to dissociate a carbon monoxide moleule into carbon and oxygen atoms E = 11eV
We know that E = hv, where h = 6.62 × 10–34 J – s
v = frequency
⇒ 11 eV = hv
⇒ ` v = (11 xx 1.6 xx 10^-19)/(6.62 xx 10^-34) J`
= `2.65 xx 10^15` Hz
This frequency radiation belongs to ultraviolet region.
APPEARS IN
संबंधित प्रश्न
State an additional use of the X-rays waves
Name the subjective property of light related to its wavelength.
A wave has a wavelength of 10-3 nm. Name the wave.
What is the range of the wavelength of the following electromagnetic waves?
(a)X-rays,
What is the range of the wavelength of the following electromagnetic waves?
(a) Ultraviolet
Name three properties of ultraviolet radiations which are similar to visible light.
Is it possible that in a Coolidge tube characteristic Lα X-rays are emitted but not Kα X-rays?
The distance between the cathode (filament) and the target in an X-ray tube is 1.5 m. If the cutoff wavelength is 30 pm, find the electric field between the cathode and the target.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
The stopping potential in a photoelectric experiment is linearly related to the inverse of the wavelength (1/λ) of the light falling on the cathode. The potential difference applied across an X-ray tube is linearly related to the inverse of the cutoff wavelength (1/λ) of the X-ray emitted. Show that the slopes of the lines in the two cases are equal and find its value.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Suppose a monochromatic X-ray beam of wavelength 100 pm is sent through a Young's double slit and the interference pattern is observed on a photographic plate placed 40 cm away from the slit. What should be the separation between the slits so that the successive maxima on the screen are separated by a distance of 0.1 mm?
Name the scientist who discovered Microwaves
Name the radiation of the electromagnetic spectrum which is used for the following:
To photograph internal parts of the human body and Give the frequency range
State two properties of infrared radiations which differ from visible light.
Name the radiations used for the detection of fracture in bones.
State two uses of infrared radiations.
Answer briefly.
Can we produce a pure electric or magnetic wave in space? Why?
For television broadcasting, the frequency employed is normally
A radio can tune to any station in the 7.5 mHz to 12 MHz band. What is corresponding wave length band.
Identify the part of the electromagnetic spectrum which:
- produces the heating effect.
- is absorbed by the ozone layer in the atmosphere.
- is used for studying crystal structure.
Write any one method of the production of each of the above radiations.
