Logo
Home Study Material Contact Search
AI Chat FREE
  1. sciences
  2. physics
  3. problem 5 a) show that green light (λ = 5 x 10-

Problem 5 a) Show that green light (λ = 5 x 10-7 m) can excite electrons across...

70.2K

Verified Solution

Question

Physics

Problem 5

a) Show that green light (λ = 5 x 10-7 m) can excite electronsacross the band gap of silicon (Si).

b) i. Electromagnetic radiation of frequency 3.091 x 1014 Hzilluminates a crystal of germanium (Ge). Calculate the wavelengthphotoemission generated by this interaction. Germanium is anelemental semiconductor with a band gap, Eg, of 0.7 eV. ii. Sketchthe absorption spectrum of germanium, i.e., plot % absorption vs.wavelength, λ.

c) Potassium (K) and beryllium (Be) are metals which exhibitgood electrical conductivity. Explain for both elements the reasonsfor the observed conductivity on the basis of the bandstructure.

d) A pure crystalline material (no impurities or dopants arepresent) appears red in transmitted light. i. Is this material aconductor, semiconductor or insulator? Give the reasons for youranswer . ii. What is the approximate band gap (Eg) for thismaterial in eV?

e) An unknown material is transparent to light of frequencies (ν ) up to 1.3 x 1014 s–1 . Draw a meaningful schematic bandstructure for this material.

Answer & Explanation Solved by verified expert
4.5 Ratings (766 Votes)
    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

Geometry
1.2K views

Graph the linear function by finding x and y intercepts Then write the equation using...

Accounting
1.2K views

Give some examples of potential risks and risk management options that need to be identified and...

Geometry
1.2K views

A cylinder that has a height of 20 cm and a radius of 3 cm...

Basic Math
1.2K views

The sprocket assembly for a 70 cm bike is shown below How fast does the...

Basic Math
1.2K views

Limits Continuity Course Packet on limits at infinity of rational functions The Penn State Math...

Basic Math
1.2K views

The mean annual tuition and fees for a sample of 10 private colleges was $36,000...

Statistics
1.2K views

A box contains 5 red marble(s), 2 blue marble(s), and 1 white marble(s). The marbles...

Accounting
1.2K views

3. Kendall Gardner agreed to buy from B & C Shavings a specially built shaving...

Accounting
1.2K views

20 A company reports the following: Net...

Accounting
1.2K views

Discuss the different regulations put in place by the Canadian government to enhance corporate ethics...

Accounting
1.2K views

Maple Corporation and its subsidiary reported consolidated net income of $380,000 for the year ended...

Finance
1.2K views

Which of the following is an important aspect of the loan refinance decision process? Multiple...