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Depending upon the penetration power, there are two parts of X-rays
Hard X-rays
More penetration power
More frequency of the order of ≈ 1019 Hz
Lesser wavelength range (0.1Å - 4Å)
Soft X-rays
Less penetration power
Less frequency of the order of ≈1016 Hz
More wavelength range (4Å - 100Å)
Do objects of different weights fall with same acceleration on the earth? Yes , objects fall with the similar acceleration regardless of their weights at the surface of earth,
Q. What is pair production and pair annihilation? Pair production: The conversion of a photon in to an electron-positron pair on its interaction with the strong electric fie
Example of state function
are thermo-electric thermometres fairly sensitive ?
How is plastic clad silica fibre used in optical fibres? Plastic clad silica fibre: Plastic clad silica fibre (PCS) is other type of optical cable. This has an attenuation l
Define Hole in Wall (Princeton)? A container is separated into two parts I and II by a partition with a small hole of diameter d Helium gas in the two parts is held at temper
The following data are measures of triceps skinfold thickness (X1), thigh circumference (X2), and midarm circumference (X3). These three variables are used to predict percentage o
Feeling centrifugal force Tie a weight to a string about a metre in length and then whirl the weight around at arm's length. View the outward pull on the string. This is centri
If the refractive index of a medium is 1.5, determine the critical angle. Write the difference between telescope and microscope.
Explain about the number of modes in the optical fibres. Mode in the optical fibres: A mode is a path occupied by a ray of light through an optical fibre. This is a mathemat
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