100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
CMY 383: Spectroscopy (SR) Actual Questions And Correct Detailed Answers. $13.99
Add to cart
Quickly navigate to
Preview
  2.  
  3. CMY
  4.  
  5. CMY

Exam (elaborations)

CMY 383: Spectroscopy (SR) Actual Questions And Correct Detailed Answers.
 0 purchase
  • Course
  • CMY
  • Institution
  • CMY

Describe electromagnetic radiation - correct answer 1. Electron radiations are released as photons 2. Quantized harmonic waves travel at the speed of light 3. Electric and magnetic waves are perpendicular to each other 4. Transition between the states induc...

[Show more]

Preview 2 out of 15  pages

Document information

  • October 8, 2024
  • 15
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

Written for

  • CMY
  • CMY

Seller

avatar-seller
RealGrades

Reviews received

Content preview

CMY 383: Spectroscopy (SR)

Describe electromagnetic radiation - correct answer 1. Electron radiations are
released as photons

2. Quantized harmonic waves travel at the speed of light

3. Electric and magnetic waves are perpendicular to each other

4. Transition between the states induced by electromagnetic radiation: M + hν → M*



Describe the Wave nature of a beam of single-frequency electromagnetic radiation - correct answer
1. a plane-polarized wave is shown propagating along the x-axis.

2. The electric field oscillates in a plane perpendicular to the magnetic field.

3. If the radiation were unpolarized, a component of the electric field would be seen in all planes.



Describe Wave Characteristics - correct answer 1. Amplitude (A): of the wave is the
length of the electric field vector at the wave maximum

2. Period (p): The time in seconds required for the passage of successive maxima or minima through a
fixed point in space

3. The frequency (v): is the number of oscillations of the field that occur per second and is equal to 1/p

4. The wavelength (y^) is the linear distance between any two equivalent points on successive waves
(e.g., successive maxima or minima)

5. velocity of propagation (v)i in meters per second: νi x yi



Describe the electromagnetic spectrum - correct answer 1. Radiowaves (NMR):
Excitation of nuclear spin states,

2. Microwaves: Excitation of rotational energy states

3. Infrared (IR): Excitation of vibrational energy states, i.e. stretching and bending of chemical bonds
e.g., organic functional groups.

4. UV-Vis: Excitation of electronic energy states, e.g. π-π* transition



Describe polarization of radiation - correct answer 1. Polarized radiation:

, - a beam of monochromatic radiation can be visualized as an infinite set of electric vectors that fluctuate
in length from zero to a maximum amplitude



2. Unpolarized radiation:

- electric vectors are viewed at various times during the passage of one wave of monochromatic
radiation through a fixed point in space.



3. Plane polarized radiation:

- the electric vectors are at the instant the wave is at its maximum.

- The vector in any one plane, e.g. XY, can be resolved into two mutually perpendicular components AB
and CD

- Removal of one of the two resultant planes of vibration produces a beam that is plane-polarized.

- The resultant electric vector of a plane-polarized beam then occupies a single plane.



Describe the processes happening in a Milikan's photoelectric experiment and the results obtained
thereof. - correct answer 1. a vacuum phototube circuit was used to study the
photoelectric effect

2. The surface of the large photocathode is usually coated with an alkali metal or one of its compounds.

3. When monochromatic radiation impinges on the photocathode, electrons are emitted from its surface
with a range of kinetic energies.

4. As long as the voltage V applied between the anode and the cathode is positive, the electrons are
drawn from left to right through the phototube to produce a current I in the circuit.

5. When the voltage across the phototube is adjusted so that the anode is slightly negative with respect
to the cathode, the photoelectrons are repelled by the anode, and the photocurrent decreases as
expected.

6. At this point in the experiment, however, some of the electrons have sufficient kinetic energy to
overcome the negative potential applied to the anode, and a current is still observed.

7. This experiment may be repeated for phototubes with different materials coating the photocathode.

8. In each experiment, the photocurrent is measured as a function of the applied voltage, and the
voltage V0 at which the photocurrent becomes precisely zero is noted.

9. The negative voltage at which the photocurrent is zero is called the stopping voltage.

10. It corresponds to the potential at which the most energetic electrons from the cathode are just
repelled from the anode.

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller RealGrades. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $13.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

70713 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling

Recently viewed by you

Summary ·

(0)

Information security midterm samenvatting Universiteit Utrecht

Exam (elaborations) ·

(0)

TEST BANK FOR HEALTH PROMOTION THROUGHOUT THE LIFE SPAN, 10TH EDITION

Exam (elaborations) ·

(0)

NRNP 6675 Midterm 2023 Exam-457 Questions with Updated Answers
$13.99
  • (0)
Add to cart
Added