A photosensitive surface ejects electrons when green light is incident on it. It does not emit any photoelectrons when exposed to orange light. Will there be any photoelectrons emission if blue light is incident on it ?

Explanation

To determine whether there will be photoelectron emission when blue light is incident on a photosensitive surface that emits electrons when green light is incident but does not emit when exposed to orange light, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Photoelectric Effect**: The photoelectric effect occurs when light of sufficient frequency (or energy) strikes a photosensitive material and ejects electrons. The energy of the incident light must be greater than or equal to the work function (φ) of the material for photoemission to occur.

2. **Identifying the Wavelengths**:
- Green light has a specific wavelength (approximately 520 nm) and is capable of ejecting electrons.
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