Calculate The Energy Required For The Process            He+ (g) → He2+ (g) + e–    The Ionization Energy For The H Atom In The Ground State Is  2.18 × 10–18 J Atom–1.  

Calculate the wavelength associated with an electron

(mass 9.1 × 10^–31 kg) moving with a velocity of 10³ m sec^–1

(h = 6.6 × 10^–34 kg m² sec^–1)

What will be the wavelength of a ball of mass 0.1 kg moving with a velocity of 10 ms^–1?

Calculate the mass of a photon with wavelength 3.6 Å.

A microscope using suitable photons is employed to locate an electron in an atom within a distance of 0.1 Å. What is the uncertainty involved in the measurement of its velocity?  

Calculate the uncertainty in the velocity of a wagon of mass 3000 kg whose position is known to an accuracy of ±10 pm

(Planck’s constant = 6.63 × 10^–34 Js) 

Calculate the uncertainty in the position of an electron if the uncertainty in its velocity is 5.7 × 10⁵ m/sec (h = 6.6 × 10^–34 kg m² s^–1, mass of the electron = 9.1×10^–31 kg).

A golf ball has a mass of 40 g and a speed of 45 m/s. If the speed can be measured within accuracy of 2%, calculate the uncertainty in position.

If an electron is moving with a velocity 600 ms^–1 which is accurate upto 0.005%, then calculate the uncertainty in its position. 

  (h = 6.63 × 10^–34 Js, mass of electron = 9.1 × 10^–31 kg) 

What is the transition in the hydrogen spectrum would have the same wavelength as the Balmer transition, n = 4 to n = 2 of He⁺ spectrum?

A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57 μm. Calculate the rate of emission of quanta per second.