a. Calculate the number of photoelectrons per second ejected from a 1.25 mm2 area of sodium...

a. Calculate the number of photoelectrons per second ejected from a 1.25 mm² area of sodium metal by 500 nm EM radiation having an intensity of 1.3 kW/m² (i.e. the intensity of sunlight above the Earth's atmosphere).

b. If the bonding energy is 2.28 eV, what power is carried away by the electrons?

Expert Solution

In the given problem

a) number of photoelectrons ejected per second can be find using below formula

b)power carried away by the electrons =

Here

a)number of photoelectrons per second,

b) power carried away by electrons, P=0.1346 mW (milli Watt).

genius_generous answered 2 years ago

Photoelectrons are ejected from a metal when exposed to 238-nm radiation, but no photoelectrons are observed...

Photoelectrons are ejected from a metal when exposed to 238-nm radiation, but no photoelectrons are observed when the metal is exposed to 265 nm radiation. Which of the following is true? a. No photoelectrons will be ejected if the metal is exposed to 285 nm radiation. b. 226 nm radiation will cause a greater number of photoelectrons to be ejected from the metal. c. No photoelectrons will be ejected if the metal is exposed to 253 nm radiation. d. 253...

Calculate the number of free electrons per cubic centimeter (and per atom) for sodium from resistance...

Calculate the number of free electrons per cubic centimeter (and per atom) for sodium from resistance data (relaxation time 3.1*10-14 s)

The work function of sodium is 2.75eV. Calculate the threshold wavelength of light at whigh emission of photoelectrons will first be observed.

1.1 The work function of sodium is 2.75eV. Calculate the threshold wavelength of light at whigh emission of photoelectrons will first be observed. 1.1 Answer: Threshold wavelength = 451nm 1.2 The threshold wavelength for photoemission of electrons from potassium is 564nm. Calculate the maximum velocity of the photoelectrons that will be emitted when the metal is irradiated by light with a wavelength of 300nm. 1.2 Answer: Maximum velocity = 8.25*10^5 m/s 1.3 The ionization energes of electrons in the...

Calculate the number of grams of sodium in 8.3 gg of each of the following sodium-containing...

Calculate the number of grams of sodium in 8.3 gg of each of the following sodium-containing food additives. NaClNaCl (table salt) Na3PO4Na3PO4 (sodium phosphate) NaC7H5O2NaC7H5O2 (sodium benzoate) Na2C6H6O7Na2C6H6O7 (sodium hydrogen citrate) .

With work shown. 7. Calculate the number of sodium atoms in 4.66 moles of sodium. 8....

With work shown. 7. Calculate the number of sodium atoms in 4.66 moles of sodium. 8. What is the molar mass fo a substance if 0.6502 moles of the substance has a mass of 19.27 grams? 9. How many grams are present in 7.5 moles of Cu (NO3)2? 10. How many atoms are present in a Mg sample with a mass of 14.6 grams? 11. How many atoms of H are present in 37.6 g of NH3? 12. How many...

Calculate the number of moles of hydrogen produced by the reaction of sodium with water, which...

Calculate the number of moles of hydrogen produced by the reaction of sodium with water, which resulted to formation of NaOH and H2? In the reaction, 1.3 L gas is collected by water displacement at 26 °C. The atmospheric pressure is 756 torr. (The partial pressure of water vapor at 26 °C is 25 torr.)

Topic: Spectroscopy (1 point) Calculate the photons emitted per second from an Alexa488 dye pumped at...

Topic: Spectroscopy (1 point) Calculate the photons emitted per second from an Alexa488 dye pumped at 100 W/cm 2 .

A number is selected at random from the set {1,2,...,20}. Then a second number is selected...

A number is selected at random from the set {1,2,...,20}. Then a second number is selected randomly between 1 and the ﬁrst number selected. What is the probability that the second number is 5?

2) (a) Calculate the Capacitance per unit area of a MOSCAP with an oxide thickness of...

2) (a) Calculate the Capacitance per unit area of a MOSCAP with an oxide thickness of 2 , when it is biased in inversion. The oxide is Silicon dioxide, the semiconductor is silicon, and the metal is Copper. (b) Does your answer depend on if the silicon substrate is p-type or n-type? (c) Does your answer depend on the type of metal used.

The activity of a radioactive sample is the number nuclear disintegrations per second, which is equal...

The activity of a radioactive sample is the number nuclear disintegrations per second, which is equal to the first-order rate constant times the number of radioactive nuclei present. The fundamental unit of radioactivity is the curie (Ci), where 1 Ci corresponds to exactly 3.70 × 1010 disintegrations per second. This decay rate is equivalent to that of 1 g of radium−226. The molar mass of Ra−226 is 226.03 g/mol. a.Calculate the rate constant for the radium decay. b.Calculate the half-life...

Question