Question

Minimum wavelength of emitted photon of Balmer series for hydrogen atom is (Rh is the Rydberg constant)
a) 4 / 3Rh
b) 9 / 2Rh
c) 4 / Rh
d) 9 / Rh

Answer 1

Answer:

The M249 light machine gun, also known as the M249 Squad Automatic Weapon which continues to be the manufacturer's designation and formally written as Light Machine Gun, 5.56 mm, M249, is the American adaptation of the Belgian FN Minimi, a light machine gun manufactured by the Belgian company FN Herstal. Wikipedia

Length: 1.04 m

Muzzle velocity: 915 m/s

Manufacturer: FN Herstal

Place of origin: Belgium (Minimi); United States (M249)

Feed system: M27 linked disintegrating belt, STANAG magazine

Barrel length: 465 mm (18 in); 521 mm (21 in)

Cartridge: 5.56×45mm NATO