GATE XE · 2025 · XE-C
Question 52: Properties and Applications of Materials
Give it a try, then reveal the answer to check your work.
Question 52
XE-CNAT1 markNeeds review
A GaP–GaAs semiconductor LED display has a band gap of 1.9 eV. The wavelength of emitted light in
m is (round off to two decimal places) __________Given: Planck’s constant = 6.63 × 10
J s
Velocity of light = 3 × 10
m s
1 eV = 1.6 × 10
JLog in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerEXPLORE & PRACTISE
Paper and topic context
See where this question comes from and choose what to practise next.
2025XE-C
GATE XE 2025 · Paper 1
Engineering Sciences · Original paper archive
- Section
- Section XE-C
- Question type
- Numerical answer (NAT)
- Marks
- 1 mark
Practise related topics
Explore more previous year questions using this question’s imported topic tags.
engineering sciences
GATE XE previous year questions
engineering
GATE XE previous year questions
applied science
GATE XE previous year questions
properties applications materials
GATE XE previous year questions
Properties and Applications of Materials
GATE XE previous year questions
Comments
Ask a question, share your approach, or help someone understand.
Log in to view the discussion
You’re not logged in. Log in or create an account to see discussions and add comments.