Arrange the following em waves in descending order of wavelengths : γ ray, microwaves UV radiations.

Explanation

To arrange the electromagnetic (EM) waves in descending order of their wavelengths, we need to understand the relationship between wavelength and energy. The energy of electromagnetic waves is inversely proportional to their wavelength, which means that waves with higher energy have shorter wavelengths, and waves with lower energy have longer wavelengths.

### Step-by-Step Solution:

1. **Identify the EM Waves**: The given EM waves are gamma rays (γ rays), ultraviolet (UV) radiation, and microwaves.

2. **Understand Energy and Wavelength Relationship**: Recall that the energy (E) of an EM wave is related to its wavelength (λ) by the equation:
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