Which of the following has maximum energy?

Options

A. Blue light
B. Green light
C. Red light
D. Yellow light

Explanation

To determine which type of light has the maximum energy among blue light, red light, green light, and yellow light, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Energy Formula**:
The energy (E) of light is given by the formula:
\[ E = h \cdot v \]
where \( h \) is Planck's constant and \( v \) is the frequency of the light.

2. **Recognize the Relationship**:
From the formula, we can see that energy is directly proportional to frequency. This means that the higher the frequency, the greater the energy.

3. **List the Frequencies of Each Light**:
- Red light: \( 4 \times 10^{14} \) Hz
- Green light: \( 5.4 \times 10^{14} \) Hz
- Yellow light: \( 5.6 \times 10^{14} \) Hz
- Blue light: \( 6.5 \times 10^{14} \) Hz

4. **Compare the Frequencies**:
Now, we will compare the frequencies of the different types of light:
- Red light: \( 4 \times 10^{14} \) Hz
- Green light: \( 5.4 \times 10^{14} \) Hz
- Yellow light: \( 5.6 \times 10^{14} \) Hz
- Blue light: \( 6.5 \times 10^{14} \) Hz

5. **Identify the Maximum Frequency**:
Among the listed frequencies, blue light has the highest frequency at \( 6.5 \times 10^{14} \) Hz.

6. **Conclude the Answer**:
Since blue light has the highest frequency, it also has the maximum energy. Therefore, the answer to the question is:
\[ \text{Blue light has maximum energy.} \]