What while radiation is passed through a sample of hydrogen gas at room temperature , absorption lines are observed in lyman series only Explain

If radiation of all wavelengths from ultraviolet to infrared ispassed through hydrogen gas at room temperature absorption lines will be observed in the

A beam of ultraviolet light of all wavelength passes through hydrogen gas at room temperature, in the x-direction. Assume that all photons emitted due to electron transitions inside the gas emerge in the y-direction. Let A and B denote the lights emerging from the gas in the x-and y-directions respectively. (i) Some of the incident wavelengths will be absent in A (ii) Only those wavelengths will be present in B which are absent in A (iii) B will contain some visible light (iv) B will contain some infrared light

A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. What series of wavelengths will be emitted?

Let speed of sound waves in hydrogen gas at room temperature is v_(0) . What will be the speed of sound waves in a room which contains an equimolar mixture of hydrogen and 'He' at same temperature :-

Electromagnetic waves of wavelenglth 1242 Å are indicdent on a metal of work funcation 2eV . The target metal is connected to a 5 volt cell, as shown. The electrons pass through hole A into a gas of hydrogen atoms in their groynd stte. Find the number of spectral lines emitted when hydrogen atoms come back to their froynd states after gaving veen excited by the electrons, Assume all excitations in H-atoms from ground state only ( hc = 12420 eVÅ )

Given below are observations on molar specific heats at room temperature of some common gases. The measured molar specific heats of these gases are markedly different from those for monatomic gases. Typically, molar specific heat of a monatomic gas is 2.92 cal/mol K. Explain this difference. What can you infer from the somewhat larger (than the rest) value for chlorine ?

An electric toaster uses nichrome for its heating element. When a negligibly small current passes through it, its resistance at room temperature (27.0^(@)C) is found to be 75.3 Omega . When the toaster is connected to a 230 V supply, the current settles, after a few seconds, to a steady value of 2.68 A. What is the steady temperature of the nichrome element ? The temperature coefficient of resistance of nichrome averaged over the temperature range involved , is 1.70 xx 10^(-4) ""^(@) C^(-1) .