How do you calculate lower threshold?
The 60% method – this calculates the threshold level by adding 60% of the range of your heart rate to the resting pulse rate.
- For example: if a person’s resting pulse rate = 80.
- and his maximum rate = 180.
- then the range = (180 – 80) = 100.
- 60% of the range = 60.
- so the threshold rate = (80 + 60) = 140.
What is the formula of threshold energy?
Kmin = Kth = −Q MX + mx MX This equation is valid if the energies are much less than rest mass energies of the involved particles. In other words, the kinetic energy and momentum of particles can be treated classically, or non-relativistic.
What is Platinum threshold frequency?
The threshold frequency for photoelectric emission of electrons from platinum is 1.3 × 10^15 s^-1 .
What is the formula for stopping potential?
The maximum kinetic energy (Kmax) of the photoelectrons (with charge e) can be determined from the stopping potential (V0). When charge (e) is given in coulombs, the energy will be calculated in joules….equations.
| E = hf = | hc |
|---|---|
| λ |
What is cutoff for stopping potential?
Stopping potential or cut-off potential is defined as the required potential for stopping the removal of an electron from a metal surface when the incident light energy is greater than the work potential of the metal on which the incident light is focused.
What is the unit of stopping potential?
volt
Which Colour has maximum stopping potential?
Violet
For which Colour stopping potential is minimum?
What color of the rainbow has the lowest frequency?
Red
What is the blue Colour wavelength?
Blue light has shorter waves, with wavelengths between about 450 and 495 nanometers. Red light has longer waves, with wavelengths around 620 to 750 nm. Blue light has a higher frequency and carries more energy than red light. The wavelengths of light waves are very, very short, just a few 1/100,000ths of an inch.