In: Chemistry
In an experiment to study the photoelectric effect, a scientist measures the kinetic energy of ejected electrons as a function of the frequency of radiation hitting a metal surface. She obtains the following plot (Figure 1). The point labeled "?0" corresponds to light with a wavelength of 523 nm.*the image wouldn't attach*
A). What is the value of ?0 in s?1?
B). What is the value of the work function of the metal in units of kJ/mol of ejected electrons?
C). Note that when the frequency of the light is greater than ?0, the plot shows a straight line with a nonzero slope. What is the slope of this line segment? Note that when the frequency of the light is greater than, the plot shows a straight line with a nonzero slope. What is the slope of this line segment?
a. The slope of the line is the value of ?, the frequency of the light. |
b. The slope of the line is the value of c, the speed of light. |
c. The slope of the line is the value of ?, the wavelength. |
d. The slope of the line is the value of h, Planck’s constant. |
a)
b)
c)
Since on y-axis we are plotting the KE and on x-axis wr are plotting the frequency, hence the slope will be y/x, which will be equal to planck's constant
Hence the correct answer is Option D