Question
Wave front formed by the collimator of a spectrometer:

Answer

  1. Spherical
Explanation:
Wave front formed by the collimator of a spectrometer is a plane wave front, when r lit is in the focus.

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

In Fresnel’s biprism (μ  = 1.5) experiment the distance between source and biprism is 0.3 m  and that between biprism and screen is 0.7m and angle of prism is 1°. The fringe width with light of wavelength 6000 Å will be(a)  3 cm(b) 0.011 cm(c) 2 cm  (d)  4 cm
       
The distance between a proton and electron both having a charge $1.6 \times 10^{-19}$ coulomb, of a hydrogen atom is $10^{-10}$ metre. The value of intensity of electric field produced on electron due to proton will be
In an electromagnet, core is made of soft iron because:
The $emf$ of a thermocouple, one junction of which is kept at $0^{\circ} \mathrm{C}$, is given by $\mathrm{e}=\mathrm{at}+\mathrm{bt}^2$ the Peltier co$-$efficient will be
A capacitor is charged by a battery. Between the plates, during process of charging:
Assertion  : Bohr had to postulate that the electrons in stationary orbits around the nucleus do not radiate.
Reason      : According to classical physics all moving electrons radiate. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
 
 
 
 
Cutoff wavelength of $X-$rays coming from a Coolidge tube depends on the:
If the external force acting on a system have zero resultant, the centre of mass:
  1. Must not move.
  2. Must not accelerate.
  3. May move.
  4. May accelerate.
The phenomenon of photo emission depends on:
A resistor of resistance R is connected to an ideal battery. If the value of R is decreased, the power dissipated in the resistor will: