Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
Given:
`lambda = 10 "pm" = 100 xx 10^-12 "m"`
`D = 40 "cm" = 40 xx 10^-2 "m"`
`β = 0.1 "mm" = 0.1 xx 10^-3 "m"`
`β = (lambdaD)/d`
`d = (lambdaD)/β`
= `(100 xx 10^-12 xx 40 xx 10^-2)/(10^-3 xx 0.1)`
= `4 xx 10^-7 "m"`
APPEARS IN
संबंधित प्रश्न
Name the parts of the electromagnetic spectrum which is
used to treat muscular strain.
Write in brief, how these waves can be produced.
Name the electromagnetic radiations used for (a) water purification, and (b) eye surgery.
The wavelengths for the light of red and blue colours are roughly 7.8 × `10^7` m and 4.8 × `10^7` m respectively.
(a) Which colour has the greater speed in vacuum?
(b) Which colour has the greater speed in glass?
What do you understand by the invisible spectrum?
State the approximate range of wavelength associated with infrared rays.
Two waves A and B have wavelength 0.01 Å and 9000 Å respectively.
- Name the two waves.
- Compare the speeds of these waves when they travel in vacuum.
How are X-rays produced?
Cutoff wavelength of X-rays coming from a Coolidge tube depends on the
(a) target material
(b) accelerating voltage
(c) separation between the target and the filament
(d) temperature of the filament.
Consider a photon of continuous X-ray and a photon of characteristic X-ray of the same wavelength. Which of the following is/are different for the two photons?
Name the radiation which can be detected by thermopile.
Calculate the shortest wavelength of electromagnetic radiation present in Balmer series of hydrogen spectrum.
Name the radiation of the electromagnetic spectrum which is used for the following:
For taking photographs of the sky during the night and foggy conditions . Give the frequency range
How will you investigate the existence of the radiation beyond the red and violet extremes of the spectrum?
Name two sources of infrared radiation.
Solve the numerical problem.
Calculate the frequency in MHz of a radio wave of wavelength 250 m. Remember that the speed of all EM waves in a vacuum is 3.0 × 108 m/s.
The frequency of x-rays, y-rays and ultraviolet rays are respectively a, b and c. Then:-
The frequency of e. m waves which is best suited .to observed of radius 3 × 10–4 his of the order of
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 ______.
Electromagnetic waves with wavelength
- λ1 is used in satellite communication.
- λ2 is used to kill germs in water purifies.
- λ3 is used to detect leakage of oil in underground pipelines.
- λ4 is used to improve visibility in runways during fog and mist conditions.
- Identify and name the part of electromagnetic spectrum to which these radiations belong.
- Arrange these wavelengths in ascending order of their magnitude.
- Write one more application of each.
Which is the correct ascending order of wavelengths?
