If the wavelength of an electromagnetic wave is about the diameter of an apple what type of radiation is it ?

Options

A. X ray
B. UV
C. Infrared
D. Microwave

Answer

To determine the type of electromagnetic radiation with a wavelength approximately equal to the diameter of an apple, we can follow these steps:

### Step 1: Understand the Wavelength Range
The diameter of an apple is typically around 5 to 10 cm. Therefore, we need to find the type of electromagnetic radiation that has a wavelength in the range of approximately 0.05 to 0.1 meters (5 to 10 cm).

### Step 2: Review the Wavelengths of Different Types of Radiation
Let's look at the typical wavelength ranges for various types of electromagnetic radiation:

- **X-rays**: 10^-11 to 10^-8 meters (0.01 nm to 0.1 nm)
- **Ultraviolet (UV) rays**: 10^-9 to 10^-7 meters (1 nm to 400 nm)
- **Infrared (IR) rays**: 10^-6 to 10^-3 meters (700 nm to 1 mm)
- **Microwaves**: 10^-3 to 1 meter (1 mm to 1 meter)

### Step 3: Compare Wavelength Ranges
Now, we compare the diameter of an apple (5 to 10 cm or 0.05 to 0.1 meters) with the wavelength ranges:

- **X-rays**: Too short (10^-11 to 10^-8 m)
- **Ultraviolet (UV) rays**: Too short (10^-9 to 10^-7 m)
- **Infrared (IR) rays**: Too short (10^-6 to 10^-3 m)
- **Microwaves**: This range includes wavelengths from 1 mm to 1 meter, which encompasses the diameter of an apple.

### Step 4: Conclusion
Since the only type of radiation that falls within the wavelength range corresponding to the diameter of an apple (5 to 10 cm) is microwaves, we conclude that the type of radiation is **microwaves**.

### Final Answer
The type of radiation with a wavelength about the diameter of an apple is **microwaves**.

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