The mass of a photoelectron is

Options

A. `9.1xx 10^(-27 ) kg `
B. `9.1xx 10^(-29 ) kg `
C. `9.1xx 10^(-31 ) kg `
D. `9.1xx 10^(-34 ) kg `

Explanation

To find the mass of a photoelectron, we can refer to the known properties of electrons. Here’s a step-by-step solution:

### Step 1: Understand the Concept of Photoelectrons
Photoelectrons are electrons that are emitted from a material (usually a metal) when it is exposed to light of sufficient energy (frequency). This phenomenon is known as the photoelectric effect.

**Hint:** Remember that photoelectrons are simply electrons that have absorbed enough energy to escape from the surface of a material.

### Step 2: Identify the Mass of an Electron
The mass of an electron is a well-known constant in physics. It is approximately \(9.1 \times 10^{-31}\) kg. Since photoelectrons are essentially electrons that have been emitted due to the photoelectric effect, their mass is the same as that of a regular electron.

**Hint:** Look up the mass of an electron in a physics reference or textbook if you're unsure.

### Step 3: Choose the Correct Option
Given the options:
a. \(9.1 \times 10^{-27}\) kg
b. \(9.1 \times 10^{-29}\) kg
c. \(9.1 \times 10^{-31}\) kg
d. \(9.1 \times 10^{-34}\) kg

The correct answer is option **c**, which is \(9.1 \times 10^{-31}\) kg.

**Hint:** Compare the values in the options with the known mass of an electron to identify the correct choice.

### Final Answer
The mass of a photoelectron is \(9.1 \times 10^{-31}\) kg.