The wavelength of light in the visible region is about 390 nm for violet colour and about 760 nm for red colour. The energy of photon in eV at violet end is

Question

The wavelength of light in the visible region is about 390 nm for violet colour and about 760 nm for red colour. The energy of photon in eV at violet end is (A) 2.32 (B) 3.19 (C) 1.42 (D) 4.13

Tardigrade Admin · Accepted Answer

Energy of the incident photon, E=h upsilon=(hc/λ) For violet light, λ=390 nm ∴ Incident photon energy, E=(6.63×10-34×3×108/390×10-9)J =5.1×10-19 J =(5.1×10-19/1.6×10-19)eV =3.19 eV

Q. The wavelength of light in the visible region is about $390 nm$ for violet colour and about $760 nm$ for red colour. The energy of photon in $e V$ at violet end is

$2.32$

$3.19$

$1.42$

$4.13$

Q. The wavelength of light in the visible region is about 390nm for violet colour and about 760nm for red colour. The energy of photon in eV at violet end is

2.32

3.19

1.42

4.13

Energy of the incident photon, E=hυ=λhc​ For violet light, λ=390nm ∴ Incident photon energy, E=390×10−96.63×10−34×3×108​J =5.1×10−19J=1.6×10−195.1×10−19​eV =3.19eV

Q. The wavelength of light in the visible region is about $390 nm$ for violet colour and about $760 nm$ for red colour. The energy of photon in $e V$ at violet end is

$2.32$

$3.19$

$1.42$

$4.13$