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
Identify the part of the electromagnetic spectrum which is suitable for radar system used in aircraft navigation.
If the earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain.
The terminology of different parts of the electromagnetic spectrum is given in the text. Use the formula E = hv (for energy of a quantum of radiation: photon) and obtain the photon energy in units of eV for different parts of the electromagnetic spectrum. In what way are the different scales of photon energies that you obtain related to the sources of electromagnetic radiation?
Give a reason for the following:
It is necessary to use satellites for long-distance TV transmission. Why?
A wave has wavelength 50 Å.
- Name the wave.
- State its speed in vacuum.
- State its one use.
Name the subjective property of light related to its wavelength.
Which radiation is used for satellite communication?
Name two electromagnetic waves of frequency smaller than that of violet light. State one use of each.
Give one use of gamma rays.
An electromagnetic wave has a frequency of 500 MHz and a wavelength of 60 cm Calculate the velocity of the wave.
Moseley's Law for characteristic X-ray is √v = a(Z − b). Here,
If the Earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain.
An e.m. wave exerts pressure on the surface on which it is incident. Justify.
For television broadcasting, the frequency employed is normally
Following QN ∴ 14, the radiation force on the roof will be
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 ______.
Why does microwave oven heats up a food item containing water molecules most efficiently?
Name the electromagnetic radiation whose frequency is 10 Hz.
