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Direction: Question consists of two statements, one labeled as the 'Assertion (A)' and the other as 'Reason (R)'. Examine these two statements carefully and select the answer to this question using the codes given below:
Assertion (A): Many semiconductors where minimum energy in the conduction band and maximum energy in the valence band occur at the same value of  (wave vector), are preferred for optical lenses.
Reason (R): For such semiconductors, the efficiency of carrier generation and recombination is very high.
  • a)
    Both A and R are individually true and R is the correct explanation of A
  • b)
    Both A and R are individually true but R is not the correct explanation of A
  • c)
    A is true but R is false
  • d)
    A is false but R is true
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Direction: Question consists of two statements, one labeled as the Ass...
Assertion Explanation-
A direct band-gap (DBG) semiconductor is one in which the maximum energy level of the valence band aligns with the minimum energy level of the conduction band with respect to momentum as shown in the figure.

Reason Explanation-
In a DBG semiconductor, direct recombination takes place with the release of the energy equal to the energy difference between the recombining particles. The probability of radiative recombination is high in the case of DBG semiconductors. Hence the efficiency factor of a DBG semiconductor is high. That’s why DBG semiconductors are always preferred for making optical sources.
Note- Best example of direct bandgap semiconductors is GaAs, InAs, InSb, GaN, InN, ZnO, CdSe, ZnS.
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Direction: Question consists of two statements, one labeled as the Assertion (A) and the other as Reason (R). Examine these two statements carefully and select the answer to this question using the codes given below:Assertion (A): Many semiconductors where minimum energy in the conduction band and maximum energy in the valence band occur at the same value of(wave vector), are preferred for optical lenses.Reason (R): For such semiconductors, the efficiency of carrier generation and recombination is very high.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'A'. Can you explain this answer?
Question Description
Direction: Question consists of two statements, one labeled as the Assertion (A) and the other as Reason (R). Examine these two statements carefully and select the answer to this question using the codes given below:Assertion (A): Many semiconductors where minimum energy in the conduction band and maximum energy in the valence band occur at the same value of(wave vector), are preferred for optical lenses.Reason (R): For such semiconductors, the efficiency of carrier generation and recombination is very high.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'A'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about Direction: Question consists of two statements, one labeled as the Assertion (A) and the other as Reason (R). Examine these two statements carefully and select the answer to this question using the codes given below:Assertion (A): Many semiconductors where minimum energy in the conduction band and maximum energy in the valence band occur at the same value of(wave vector), are preferred for optical lenses.Reason (R): For such semiconductors, the efficiency of carrier generation and recombination is very high.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: Question consists of two statements, one labeled as the Assertion (A) and the other as Reason (R). Examine these two statements carefully and select the answer to this question using the codes given below:Assertion (A): Many semiconductors where minimum energy in the conduction band and maximum energy in the valence band occur at the same value of(wave vector), are preferred for optical lenses.Reason (R): For such semiconductors, the efficiency of carrier generation and recombination is very high.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Direction: Question consists of two statements, one labeled as the Assertion (A) and the other as Reason (R). Examine these two statements carefully and select the answer to this question using the codes given below:Assertion (A): Many semiconductors where minimum energy in the conduction band and maximum energy in the valence band occur at the same value of(wave vector), are preferred for optical lenses.Reason (R): For such semiconductors, the efficiency of carrier generation and recombination is very high.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electronics and Communication Engineering (ECE). Download more important topics, notes, lectures and mock test series for Electronics and Communication Engineering (ECE) Exam by signing up for free.
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