Close search dialog.. Red light of wavelength of 700 nm falls on a double slit separated by 400 nm.. This is College Physics Answers with Shaun Dychko. 700.

Q. The de Broglie wavelength of an electron moving with kinetic energy of 144eV is nearly 31393 94 NEET NEET 2020 Report Error A 102× 10−3nm B 102× 10−4nm C 102× 10−5nm D 102× 10−2nm Solution: λ = V 12.27A˚ = 14412.27 × 1010 = 1.02 × 10−10 m = 102 ×10−3 nm

Wavelengths are generally given inmeters (or some decimal fraction of a meter) or Angstroms (Å, 10-10 meter). Since all electromagnetic radiation travels at the same speed (in a vacuum), the number of crests(or troughs) passing a given point in space in a given unit of time (say, one second), varies withthe wavelength.

Electromagnetic waves are categorized according to their frequency f or, equivalently, according to their wavelength λ = c/f. Visible light has a wavelength range from ~400 nm to ~700 nm. Violet light has a wavelength of ~400 nm, and a frequency of ~7.5*10 14 Hz. Red light has a wavelength of ~700 nm, and a frequency of ~4.3*10 14 Hz.

Best answer E = N hv = N h c λ = (6.02 × 1023mol −1) × (6.626 × 10 −34J s) × (3 × 108ms−1) 242 × 10−9m E = N h v = N h c λ = ( 6.02 × 10 23 m o l - 1) × ( 6.626 × 10 - 34 J s) × ( 3 × 10 8 m s - 1) 242 × 10 - 9 m = 4.945 × 105J mol−1 = 494.5kJ mol−1 = 4.945 × 10 5 J m o l - 1 = 494.5 k J m o l - 1 ← Prev Question Next Question →