Blue light can eject photo electron from a photo sensitive surface while orange light cannot. Then

Answer

To solve the question, we need to analyze the relationship between the frequency of light and its ability to eject photoelectrons from a photosensitive surface.

### Step-by-Step Solution:

1. **Understanding the Photoelectric Effect**:
The photoelectric effect states that electrons can be ejected from a material when it is exposed to light of sufficient frequency. This frequency must be greater than a certain threshold frequency specific to the material.

2. **Identifying the Given Information**:
- Blue light can eject photoelectrons.
- Orange light cannot eject photoelectrons.

3. **Determining the Threshold Frequency**:
Since blue light can eject photoelectrons, we can conclude that the frequency of blue light is greater than the threshold frequency of the material. Conversely, since orange light cannot eject photoelectrons, its frequency is less than the threshold frequency.

4. **Comparing Other Colors of Light**:
- **Violet Light**: Violet light has a frequency higher than that of blue light. Therefore, it can also eject photoelectrons since it exceeds the threshold frequency.
- **Red Light**: Red light has a frequency lower than that of blue light. Therefore, it cannot eject photoelectrons as its frequency is below the threshold frequency.

5. **Conclusions**:
- Violet light can eject photoelectrons (True).
- Red light cannot eject photoelectrons (True).
- Therefore, the correct answer is "all the above" since both statements about violet and red light are correct.

### Final Answer:
The correct option is **"all the above"**.

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