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The next two questions pertain to the situation described below. Calcium atoms (mass = 6.66x10-26 kg), assumed to be indistinguishable, are cooled to a velocity 4 m/s, and then directed one by one onto two nanofabricated slits, cach of width 50 nm, separated by 200 nm (between their centers). On a screen 4 meters away, the atoms are most likely to be detected at a point directly across from the midpoint of the two slits. Slits close-up 50 nm Ca atom 200 nm source 4 m 19) What is the minimum transverse distance on the screen so that the probability to detect the atoms is actually zero? a. 2.5 cm b. 5 cm c. O cm 20) Excitation laser All excited All Ca atoms in ground state None excited Now we change the experiment in the following way: We focus a laser onto a small spot that ONLY interacts with atoms passing through the top slit. The wavelength of the laser is such that it excites any atom that passes through the spot from the ground state to a highly excited state (for simplicity, assume that any such atom stays in the excited state until the atom reaches the detection screen). Now what is the minimum transverse distance on the screen so that the probability to detect the atoms is actually zero? a. 20 cm b. 2 cm с. О ст d. There is no such point- at every point on the screen there will always be some possibility to find the atoms. e. 125 nm Detection screen

The next two questions pertain to the situation described below. Calcium atoms (mass = 6.66x10-26 kg), assumed to be indistinguishable, are cooled to a velocity 4 m/s, and then directed one by one onto two nanofabricated slits, cach of width 50 nm, separated by 200 nm (between their centers). On a screen 4 meters away, the atoms are most likely to be detected at a point directly across from the midpoint of the two slits. Slits close-up 50 nm Ca atom 200 nm source 4 m 19) What is the minimum transverse distance on the screen so that the probability to detect the atoms is actually zero? a. 2.5 cm b. 5 cm c. O cm 20) Excitation laser All excited All Ca atoms in ground state None excited Now we change the experiment in the following way: We focus a laser onto a small spot that ONLY interacts with atoms passing through the top slit. The wavelength of the laser is such that it excites any atom that passes through the spot from the ground state to a highly excited state (for simplicity, assume that any such atom stays in the excited state until the atom reaches the detection screen). Now what is the minimum transverse distance on the screen so that the probability to detect the atoms is actually zero? a. 20 cm b. 2 cm с. О ст d. There is no such point- at every point on the screen there will always be some possibility to find the atoms. e. 125 nm Detection screen

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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The next two questions pertain to the situation described below. Calcium atoms (mass = 6.66x10-26 kg), assumed to be indistinguishable, are cooled to a velocity 4 m/s, and then directed one by one onto two nanofabricated slits, cach of width 50 nm, separated by 200 nm (between their centers). On a screen 4 meters away, the atoms are most likely to be detected at a point directly across from the midpoint of the two slits. Slits close-up 50 nm Ca atom 200 nm source 4 m 19) What is the minimum transverse distance on the screen so that the probability to detect the atoms is actually zero? а. 2.5 ст b. 5 cm с. 0 сm 20) Excitation laser All excited All Ca atoms in ground state None excited Now we change the experiment in the following way: We focus a laser onto a small spot that ONLY interacts with atoms passing through the top slit. The wavelength of the laser is such that it excites any atom that passes through the spot from the ground state to a highly excited state (for simplicity, assume that any such atom stays in the excited state until the atom reaches the detection screen). Now what is the minimum transverse distance on the screen so that the probability to detect the atoms is actually zero? а. 20 сm b. 2 cm c. O cm d. There is no such point – at every point on the screen there will always be some possibility to find the atoms. e. 125 nm Detection screen
Transcribed Image Text:The next two questions pertain to the situation described below. Calcium atoms (mass = 6.66x10-26 kg), assumed to be indistinguishable, are cooled to a velocity 4 m/s, and then directed one by one onto two nanofabricated slits, cach of width 50 nm, separated by 200 nm (between their centers). On a screen 4 meters away, the atoms are most likely to be detected at a point directly across from the midpoint of the two slits. Slits close-up 50 nm Ca atom 200 nm source 4 m 19) What is the minimum transverse distance on the screen so that the probability to detect the atoms is actually zero? а. 2.5 ст b. 5 cm с. 0 сm 20) Excitation laser All excited All Ca atoms in ground state None excited Now we change the experiment in the following way: We focus a laser onto a small spot that ONLY interacts with atoms passing through the top slit. The wavelength of the laser is such that it excites any atom that passes through the spot from the ground state to a highly excited state (for simplicity, assume that any such atom stays in the excited state until the atom reaches the detection screen). Now what is the minimum transverse distance on the screen so that the probability to detect the atoms is actually zero? а. 20 сm b. 2 cm c. O cm d. There is no such point – at every point on the screen there will always be some possibility to find the atoms. e. 125 nm Detection screen
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