When a beam of atoms emerges from an oven at the absolute temperature T, the most probable de Broglie wavelength for a given atom is Amp h /5mkT In this expression, m is the mass of an atom, and k is Boltzmann's constant. Part A What is the most probable speed of a hydrogen atom emerging from an oven at 400 K ? Η ΜΕ ΑΣΦ 跖 0 ? Ump = Submit Request Answer km/s

Why does the energy of characteristic x rays become increasingly greater for heavier atoms?

A carbon dioxide laser used in surgery emits infrared radiation with a wavelength of 10.6 µm . In 1.00 ms, this laser raised the temperature of 1.00 cm of flesh to and evaporated it. (a) How many photons were required? You may assume that flesh has the same heat of vaporization as water, (b) What was the minimum power output during the flash?

When a wide spectrum of light passes through hydrogengas at room temperature, absorption lines are observedthat correspond only to the Lyman series. Why don’t weobserve the other series?

Assume we have a material with a work function of 4.87 eV. What is the maximum speed, in meteres per second, of electrons ejected from this metal by photons of light with wavelength 85 nm?

¥ B Which o the following satement i ncorrect - (1) Ky emission has higher wavelength and encrgy than kg (1) First line of Lyman series has. :mgy%(imn energy of first line of Balmer series, both for H-atom, (111 For a free Heatom during emission of photon, momentum of He-atom does not change (IV) If on €™ of energy 1036V is from n= 110~ 2in H-atom| lides of with stationary H-atom then excitation of e~ takes places @ L ) LV (@ 1Lam @ LV

What is the deBroglie wavelength of a 1500 kg car traveling at 100km/hr(27.8 m/s)?

X-rays of wavelength λ = 0.140nm are scatteredfrom carbon. What is the expected Compton wavelengthshift for photons detected at angles (relative to the incident beam) of exactly (a) 45°, (b) 90°, (c) 180°?

A photon of 3.53 x 10-28 kg.m/s momentum is emittedfrom a hydrogen atom. To what spectrum series does thisphoton belong, and from what energy level was it ejected?

What is the radius for an electron having total energy of -3eV in the third energy level?