Question

According to Einstein's photoelectric equation, the graph of the kinetic energy of the emitted photoelectrons versus the frequency of incident radiation gives a straight line whose slope

• A. depends on the intensity of incident radiation.
• B. depends on the nature of the metal used.
• C. is the same for all metals and independent of the intensity of radiation.
• D. depends on both the intensity of incident radiation and the nature of metal used.

Hint:

From K = h nu - phi, the slope is Planck's constant.

Answer 1

The Correct Option is C

Step 1: Equation of the Line:
$K_{max}=h\nu-\phi$ has slope $h$ and intercept $-\phi$.

Step 2: Meaning:
Different metals give parallel lines with the same slope $h$, shifted by their work functions.

Step 3: Answer:
Option (C).

Final Answer:
Option (C). \[ \boxed{\text{(C)}} \]