Neon gas is generally used in the sign boards. If it emits strongly at 616nm, calculate
The frequency of emission

Neon gas is generally used in the sign boards. If it emits strongly at 618nm, calculate energy of quantum and

Neon gas is generally used in the sign boards. If it emits strongly at 619nm, calculate number of quantum present if it produces 2J of energy.

Neon gas is generally used in the sign boards. If it emits strongly at 617nm, calculate Distance travelled by his radiation in 30s

The longest wavelength doublet absorption transition is observed at 589 and 589.6nm. Calculate the frequency of each transition and energy difference between two excited states.

A rocket is moving at a speed of 220 m//s towards a stationary target. It emits a wave of frequency 1200 Hz. Some of the sound reaching the target gets reflected back to the rocket as an echo. Calculate (1) The frequency of sound detected by the target and (2) The frequency of echo detected by rocket (velocity of sound = 330 m//s .)

A merry-go-round usually consists of a central vertical pillar. At the top of it there are horizontal rods which can rotate about vertical axis. At the end of this horizontal rod there is a vertical rod fitted like an elbow joint . At lower end of each vertical rod, There is a horse on which the rider can sit. As the merry-go-round is set into rotation, these vertical rods move away from the axis by making some angle with the vertical. The figure above shows vertical section of a merry go round in which the 'initially vertical ' rods are inclined with the vertical at 37^@ ,during rotation. Calculate the frequency of revolution of merry go round. (Use g=pi^2ms^-2 and sin37^@=0.6)

Semi - vertical angle of the conical section of a funnel is 37^@ . There is a small ball kept inside the funnel. On rotating the funnel, the maximum speed that the ball can have in order to remain in the funnel is 2 m/s. Calculate inner radius of the brim of the funnel . Is there any limit upon the frequency of rotation ? How much is it ? Is it lower or upper limit ? Given a logical reasoning. (Use g = 10 m/s^2 and sin 37^@ =0.6)