Question
Calculate the wavelength (in nanometer) associated with a proton moving at 1.0 10^ 3 ~ms ^ -1 . (Mass of proton =1.67 10^ -27 ~kg and . h =6.63 10^ -34 Js )
BITSAT
Chemistry
Structure of Atom
2021
BITSAT 2021
BITSAT Chemistry Question (2021) — Solution
Options
- A. 0.40 ~nm
- B. 2.5 ~nm
- C. 14.0 ~nm
- D. 0.32 ~nm
Answer
A. 0.40 ~nm
Step-by-step solution
aligned &= h m v = 6.63 10^ -34 1.67 10^ -27 1 10^ 3 \\ &=3.97 10^ -10 meter =0.397 nanometer 0.40 ~nm aligned
Related: Chemistry — Structure of Atom · All PYQ Banks