Search Colleges, Courses, Exams, Questions and Articles

Ask a query on 8879100846 Ask Login | Sign Up

 

 

› Ask & Answer › Question

LED is constructed from Ga – As – P semiconducting material. The energy gap of this LED is 1.9 eV. Calculate the wavelength of light emitted and its colour.

[h = 6.63 × 10-34 Js and c = 3 × 108 ms-1]

Option 1 -

654nm and orange colour 

Option 2 -

1046nm and blue colour

Option 3 -

1046nm and red colour 

Option 4 -

654nm and red colour

0 7 Views | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • P

    Answered by

    Payal Gupta | Contributor-Level 10

    a month ago
    Correct Option - 4


    Detailed Solution:

    λ=hcE=6.63×10−34×3×1081.9×1.6×10−19 = 654 nm (red)

Similar Questions for you

To measure light intensity we use
A
alok kumar singh

Kindly go through the solution ]

 

The Boolean equation for the circuit as shown in figure is

 

 

 
A
alok kumar singh

Kindly go through the solution

 

The resistance of a silicon junction diode, whose V - I characteristics is as shown in figure is (Vk = 0.7 V)

 
A
alok kumar singh

Kindly go through the solution

 

Two rain drops reach earth from clouds with different terminal velocities having ratio 9 : 4. Then the ratio of their volumes is

 
A
alok kumar singh

Kindly go through the solution

 

In the voltage regulator circuit shown below, the reverse breakdown voltage of zener diode is 3 V. Find the current through zener diode.

 
A
alok kumar singh

ibattery= 1 0 ? 3 1 0 0 0  = 7mA

i2kW = 3 2 0 0 0  =1.5 mA

iz = (7 – 1.5) mA

= 5.5mA

Get authentic answers from experts, students and alumni that you won't find anywhere else

Sign Up on Shiksha

On Shiksha, get access to

  • 65k Colleges
  • 1.2k Exams
  • 688k Reviews
  • 1800k Answers

Learn more about...

Share Your College Life Experience

Write a Review

Didn't find the answer you were looking for?

Search from Shiksha's 1 lakh+ Topics

or

Ask Current Students, Alumni & our Experts

Ask Now
Community GuidelinesUser Points System
QuestionsDiscussionsTags
×
×

This website uses Cookies and related technologies for the site to function correctly and securely, improve & personalise your browsing experience, analyse traffic, and support our marketing efforts and serve the Core Purpose. By continuing to browse the site, you agree to Privacy Policy and Cookie Policy.

Need guidance on career and education? Ask our experts

Characters 0/140

The Answer must contain atleast 20 characters.

Add more details

Characters 0/300

The Answer must contain atleast 20 characters.

Keep it short & simple. Type complete word. Avoid abusive language. Next

Your Question

Edit

Add relevant tags to get quick responses. Cancel Post