Which of the following statements is not correct ?

Options

A. Photographic plates are sensitive to infrared rays
B. Photographic plates are sensitive to ultraviolet rays
C. Infraed rays are invisible but can cast shadows like visible light
D. Infrared photons have more energy then photons of visible light

Answer

To determine which statement is not correct, we need to analyze the relationship between energy and frequency of photons. The relevant equation is:

\[ E = h \mu \]

Where:
- \( E \) is the energy of the photon,
- \( h \) is Planck's constant,
- \( \mu \) (or \( f \)) is the frequency of the photon.

### Step-by-Step Solution:

1. **Understand the relationship between energy and frequency**:
- From the equation \( E = h \mu \), we see that energy is directly proportional to frequency. This means that as frequency increases, energy also increases.

2. **Analyze the statements**:
- We need to evaluate the statements provided in the question to find the incorrect one. The statements typically compare the energy of different types of photons based on their frequencies.

3. **Compare infrared and visible light photons**:
- Infrared photons have a lower frequency than visible light photons. Since energy is proportional to frequency, this means that infrared photons will have lower energy compared to visible light photons.

4. **Identify the incorrect statement**:
- If one of the statements claims that infrared photons have more energy than visible light photons, this statement is incorrect. Therefore, we can conclude that this is the statement we are looking for.

5. **Final conclusion**:
- The incorrect statement is that infrared photons have more energy than photons of visible light.