The energy band gap of semiconducting material to produce violet (wavelength = 4000 mathringA ) LED is eV. (Round off to the nearest integer).

Question

The energy band gap of semiconducting material to produce violet (wavelength = 4000 mathringA ) LED is eV. (Round off to the nearest integer). (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

E g =( hc /λ)=(1242/λ( nm ))=(1242/400)=3.105 Answer rounded to 3 eV

Q. The energy band gap of semiconducting material to produce violet (wavelength = $4000 \overset{˚}{A}$ ) LED is ______ $e V$ . (Round off to the nearest integer).

$E_{g} = \frac{h c}{λ} = \frac{1242}{λ ( nm )} = \frac{1242}{400} = 3.105$
Answer rounded to $3 e V$

Q. The energy band gap of semiconducting material to produce violet (wavelength = 4000A˚ ) LED is ______eV. (Round off to the nearest integer).

Eg​=λhc​=λ(nm)1242​=4001242​=3.105 Answer rounded to 3eV

Q. The energy band gap of semiconducting material to produce violet (wavelength = $4000 \overset{˚}{A}$ ) LED is ______ $e V$ . (Round off to the nearest integer).

$E_{g} = \frac{h c}{λ} = \frac{1242}{λ ( nm )} = \frac{1242}{400} = 3.105$
Answer rounded to $3 e V$