V = electric potential E = electric charge = 1.6x 1040
the
Example 15.1
When a photoelectric surface is
illuminated of a light of frequency 1.3 x
10'S Hz the maximum energy of photo
electron it to be 1.8eV. Evaluate the
threshold frequency and the threshold
wavelength.
Solution
E = W. + Emax
1 del
-19
al
ious​

Athin, square metal plate measures 14 cm on each side and has emissivity of 0.60. the plate is heated to a temperature of 745°c. what is the rate at which the plate radiates energy ? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ? k4). remember that the plate will radiate energy from both its top and bottom surfaces.

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.