Three photo diodes 
and 
are made of semiconductors having bandgap of 
eV, 2 eV and 3 eV, respectively. Which one will be able to detect light of wavelength 6000Å?
A
B
C
D
and 
both
Text Solution
Verified by ExpertsThe correct answer is:
B
Energy of incident photon,
The incident radiation can be detected by a photodiode if energy of incident photon is greater than the band gap.
As , 
will detect these radiations .
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
In the forward bias arrangement of a PN-junction diode
The cut-in voltage for silicon diode is approximately
The electrical circuit used to get smooth dc output from a rectifier circuit is called
PN-junction diode works as a insulator, if connected
The electrical resistance of depletion layer is large because
In the circuit given below, the value of the current is