Logo
Home Study Material Contact Search
AI Chat FREE
  1. sciences
  2. physics
  3. please briefly answer all the questions below, and

Please briefly answer all the questions below, and writing those clearer and tidier (It is best...

70.2K

Verified Solution

Question

Physics

Please briefly answer all the questions below, and writing thoseclearer and tidier (It is best to use typing)

This is a problem related to the transmission electronmicroscopy (TEM)

  1. What is the difference between the field-emission andthermionic source TEMs?
  2. What is the purpose of the Wehnelt in a thermionic source? Whydon’t we need one in a field emission gun(FEG)?
  3. Define ‘underfocused’ and ‘overfocused’ in the TEM?
  4. What causes spherical aberration and chromatic aberration?

Answer & Explanation Solved by verified expert
4.2 Ratings (806 Votes)
TEM is a microscopy technique in which a beam of electrons is transmitted through a specimen to form an imageIn the field of optics we have always played with source to increase resolving power as in case of Michelson interferometer first we have used sodium lamp to get interferograms later to increase coherence length we have used laser source In    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Q

ou are the project manager on a project that is critical to the ongoing success of...

Operations Management
Q

1. What is the difference between the heat of reaction, Qrxn, and the enthalpy of reaction,...

Chemistry
Q

purpose of the condenser in a refrigeration system? a) rejects heat from refrigerant b)absorbs heat into...

Physics
Q

Draw a Venn diagram for the relationship XUY U U X OD Y OD U...

Basic Math
Q

Determine if the function given below is increasing, decreasing, or constant.f(x) = 0Select the correct...

Basic Math
Q

Shareholder D transfer a building to K Corporation that has a basis of $50,000 and...

Accounting
Q

. On the IRS website review Form 1040 for individuals and associated schedules (Schedule A,...

Accounting
Q

Exerclse 13-8A (Algo) T-eccounts and the accounting equation LO 13-1 Required Record each of the...

Accounting
Q

Cost of goods sold equals beginning finished goods inventory, plus cost of goods manufactured, less...

Accounting
Q

A stock has a volatility of 35%. A call option with an exercise price of...

Finance
Q

ie Amotht that Ambrose expected to invest in the project. Question 8 0.5 pts Paolho...

Accounting
Q

A common-size balance sheet portrays the firm's accounts as a percent of the: O firm's...

Finance