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ASTR 110 Astrophysics I

Question:    The chart above is a crater count-age graph which you will use through this laboratory. You use it as follows: 1. Find the region for which you want to measure the age. This region s ...

Course

ASTR110

Type

Programming

Subject

Physics

University

The University of British Columbia

Season

Fall Semester

0 Page

...

Course

PHYS0030

Subject

Physics

University

Brown University

Season

Spring

10 Pages
PH314-introduction to modern physics

o o on 鼄 do 4 List of formulas Coulomb’s Law: µ = d q d s σ = d q d A ρ = d q d V ...

Course

PH314

Subject

Physics

University

Season

Spring

0 Page
kinematics and Dynamics

...

Course

PHYS100

Subject

Physics

University

Centennial College

Season

Spring

Question

When an electric current is passed through hydrogen gas at low pressure, visible light is observed. When this light is passed through a prism, four narrow bands of light are observed against a black background. An expression relating the wavelength of the emitted light to the electronic transitions in the hydrogen atom is given in equation E1.1.

1 λ i
= R 1 n1 2
− 1 n2 2

Eq. (E1.1)
(i) Explain what the symbols in equation E1.1 represent. [4 marks]   (ii) The four lines observed are due to transitions between the following energy levels:    n=6 to n=2;  n=5 to n=2;  n=4 to n=2;  and n=3 to n=2.    Calculate the four different wavelengths of light emitted.    [The value of R is 1.09678 × 10–2 nm–1 .] [2 marks]   (iii) Why was the n=2 to n=1 transition not originally observed in the experiment on the emission spectrum of hydrogen?  [2 marks]
(b) Schrödinger's model of the atom assumes that electrons display wave-like behaviour. The model uses four quantum numbers to describe electron orbitals. Each orbital represents a particular electron-wave distribution in space.   (i) Give the names and symbols for these four quantum numbers. [2 marks]   (ii) For each quantum number, what is the permissible range of values? [2 marks]   (iii) For a hydrogen atom, if an electron occupies the n=3 level, what values can the other three quantum numbers take? How many and what type of orbitals are available for the electron to occupy? How many electrons can the n=3 level accommodate?

Mathematics

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Q

ASTR 110 Astrophysics I

Question:    The chart above is a crater count-age graph which you will use through this laboratory. You use it as follows: 1. Find the region for which you want to measure the age. This region should contain several craters of about the same size. 2. Use the ruler to make a rough measurement ...

Q

...

Q

PH314-introduction to modern physics

o o on 鼄 do 4 List of formulas Coulomb’s Law: µ = d q d s σ = d q d A ρ = d q d V ! C = ! A × ! B C = A B s i n θ ...

Q

...

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