Find out the incorrect match

Options

A. Electron - Dual nature
B. Rainbow - Discontinuous spectra
C. Atoms - Line spectra
D. Particle nature - Photoelectric effect

Answer

To solve the question of finding the incorrect match, we will analyze each option provided in the question step by step.

### Step 1: Analyze the first match - Electron vs. Dual Nature
- **Explanation**: Electrons exhibit both particle and wave-like properties, which is known as the dual nature of matter. This concept is supported by the de Broglie equation (\( \lambda = \frac{h}{mv} \)), where \( \lambda \) is the wavelength, \( h \) is Planck's constant, \( m \) is mass, and \( v \) is velocity.
- **Conclusion**: This match is **correct**.

### Step 2: Analyze the second match - Rainbow vs. Discontinuous Spectra
- **Explanation**: A rainbow displays a continuous spectrum of colors (VIBGYOR: Violet, Indigo, Blue, Green, Yellow, Orange, Red) without any gaps between the colors. In contrast, a discontinuous spectrum has distinct lines or gaps between wavelengths.
- **Conclusion**: This match is **incorrect** because a rainbow is a continuous spectrum, not a discontinuous one.

### Step 3: Analyze the third match - Atoms vs. Line Spectra
- **Explanation**: When atoms are excited, their electrons jump to higher energy levels. When these electrons return to lower energy levels, they emit light at specific wavelengths, resulting in a line spectrum that appears against a dark background.
- **Conclusion**: This match is **correct**.

### Step 4: Analyze the fourth match - Particle Nature vs. Photoelectric Effect
- **Explanation**: The photoelectric effect occurs when light (considered as packets of energy or photons) strikes a metal surface and ejects electrons. This phenomenon demonstrates the particle nature of light.
- **Conclusion**: This match is **correct**.

### Final Conclusion
After analyzing all the matches, the only incorrect match is:
- **Rainbow vs. Discontinuous Spectra** (This should be Rainbow vs. Continuous Spectra).

### Answer
The incorrect match is **Rainbow vs. Discontinuous Spectra**.

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