) What is luminescence? Briefly discuss the mechanism of LED with a neat sketch.
) What is luminescence? Briefly discuss the mechanism of LED with a neat sketch.
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only question 5b
Transcribed Image Text:has an
composite iS 25
a stress of 50 MPa is applied in the direction of fiber alignment then,
(i) Compute the elastic modulus of the composite in longitudinal and transverse direction.
(ii) Determine the strain in each phase of composite and also the stress in each phase of
composite.
Q 5. (a) What do you mean by intrinsic semiconductor? Briefly discuss the effect of temperature on
the conductivity of extrinsic semiconductor.
(b) What is luminescence? Briefly discuss the mechanism of LED with a neat sketch.
(c) Derive the conditions of band gap energies for non-metals to be transparent, opaque and
colored.
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