An electromagnetic wave `Y_1`, has a wavelength 1 cm while other electromagnetic wave `Y_2` has a frequency of `10^15Hz`. Name these two types of waves and write one useful application for each.

Explanation

To solve the question, we need to identify the types of electromagnetic waves based on the given wavelength and frequency, and then provide a useful application for each.

### Step-by-Step Solution:

1. **Identify the First Wave (Y1)**:
- Given: Wavelength of Y1 = 1 cm = 0.01 m.
- In the electromagnetic spectrum, a wavelength of 1 cm falls within the microwave region. Microwaves typically have wavelengths ranging from 1 mm to 1 m.
- **Conclusion**: Y1 is a **Microwave**.
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