Question
Which source is associated with a line emission spectrum?

Answer

  1. Neon street sign
Explanation: 
Neon street sign gives a line emission spectrum.
When neon atoms gain enough energy to become excited, light is produced. Atom releases a photon when it returns to a lower energy state.
Therefore, the source associated with a line emission spectrum is the neon street sign.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A single slit of width 0.20 mm is illuminated with light of wavelength 500 nm. The observing screen is placed 80 cm from the slit. The width of the central bright fringe will be(a) 1 mm(b) 2 mm (c) 4 mm  (d) 5 mm
       
The acceleration of moon with respect to earth is $0⋅0027\ ms^{-2}$ and the acceleration of an apple falling on earth's surface is about $10\ ms^{-2}.$ Assume that the radius of the moon is one fourth of the earth's radius. If the moon is stopped for an instant and then released, it will fall towards the earth. The initial acceleration of the moon towards the earth will be:
A proton enters a magnetic field of flux density   $1.5^{\text {weber } / m^2}$ with a velocity of  $2 \times 10^7 m / sec$ at an angle of $30^\circ$ with the field. The force on the proton will be
From the figure describing photoelectric effect we may infer correctly that         
In an electron gun the control grid is given a negative potential relative to cathode in order to:
The equation of a light wave is written as $\text{y}=\text{A}\ \sin(\kappa\text{x}-\omega\text{t}).$ Here, y represents:
  1. Displacement of either particles.
  2. Pressure in the medium.
  3. Density of the medium.
  4. Electric field.
Wave which cannot travel in vacuum is(a) X-rays  (b) Infrasonic(c) Ultraviolet(d) Radiowaves
       
A square loop of side $5 \ cm$ enters a magnetic field with $1 \ cms^{-1}.$ The front edge enters the magnetic field at $t = 0$ then which graph best depicts $emf$
According to Einstein’s photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal Vs the frequency of the incident radiation gives as straight the whose slope?
Hydrogen atom does not emit X-rays because(a) Its energy levels are too close to each other(b) Its energy levels are too apart(c) It is too small in size(d) It has a single electron