The photoelectric effect is based on ............nature of light.

Explanation

To solve the question "The photoelectric effect is based on ............nature of light", we need to understand the fundamental concepts of the photoelectric effect and the nature of light.

### Step-by-Step Solution:

1. **Understanding the Photoelectric Effect**:
The photoelectric effect refers to the phenomenon where electrons are emitted from a material (usually a metal) when it is exposed to light of sufficient frequency.

2. **Nature of Light**:
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