Recent content by bejoynp

I am sorry, I accidentally mentioned about low pressure sodium vapor lamp. I actually want to know why Xenon or Mercury spectral lines are not present in the spectrum of High Pressure Sodium lamp. The concentration of sodium in the lamp is about 1% or less.

In a sodium vapor lamp, there is 99% inert gas (Penning mixture of Argon and Neon) and 1 % Sodium, but in the spectrum, we can see only sodium lines (despite of low concentration) and no argon or neon lines.

Hi Why do we have only sodium spectral lines in the sodium vapor lamp despite the very low concentration of sodium present in the lamp.

The intensity of the radiation emitted when an electron transitions from a higher energy state to lower

Dear all I need to calculate the intensity of the spectral line. I have data from NIST website: wavelength, Aki (Einstein coefficient), gi, gk, Ei and Ek energy levels. How do i go about Thanks for your help

Dear all Thanks for your suggestion. If I don't want to use a crystal, am I still left with any options or is it mandatory to use crystal for 1MHz sine wave without having to filter square wave

Dear All I want to design a 1MHz sine wave oscillator to be used as carrier wave for Amplitude Modulation. Which will be the best approach in terms of frequency and amplitude stability and why? Can the technique be implement using high slew rate op amp and also can we use crystal...

Dear All I am looking forward to do a project in Cadence related to Analog CMOS IC Design and I need some project ideas that I can work on. thanks

Hi The final velocity of the electron can be controlled by controlling the accelerating potential. The cathode temperature will determine the no: of electron/intensity of the beam. I am not sure about calculating the starting velocity of electron but if you equate the energy required to heat...

Hi Gab A transparent medium through which laser can propagate will have an absorption rate (no matter how small it is). This will tell you the energy absorbed by the medium when laser passes through it. (Just as we have Specific Absorption Rate (SAR) in case of microwaves). You can use it to...

Hi Please explain the effect of humidity on the breakdown voltage of gases including air. Is the relationship linear or non-linear.

The gear sequence order depends on the transmission type (no. of gears) and the manufacturer. But internally, all manual transmission systems are almost same.

Hi You need to know the power factor in order to convert VA to Watts. 1. First Please find out whether your laptop adapter is an SMPS type or Transformer type. An SMPS type adapter is one fourth the weight of a transformer type. 2. SMPS power conversion is the most efficient technique...

Hi. Kindly indicate if the below could be a reason for the large inrush current when a motor is connected to supply. Can we say that the instantaneous short circuit of the motor coil responsible for the large inrush current. Any coil (whether AC motor or DC motor) has negligible resistance...

In order to destroy modern hard drives, magnetic field in the range of Tesla is required. Such a magnitude of magnetic field can be generated by powerful neodymium magnets, metallic scrap picking machine's electromagnet, MRI machine etc. Damage to entire computer can occur only by powerful...