One type of radar works by sending a pulse out to and object and timing how long it takes for the pulse to return after bouncing off of the object. If the radar is tracking a plane 100 km away how long does it take from the time the pulse leaves the radar to the time it returns?
One type of radar works by sending a pulse out to and object and timing how long it takes for the pulse to return after bouncing off of the object. If the radar is tracking a plane 100 km away how long does it take from the time the pulse leaves the radar to the time it returns?
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Question
 \( t = \frac{d}{v} \)
### 4. Radar Antenna and Wavelengths
**4.a. Range of Wavelengths**
Radar antennas tend to be of comparable size to their wavelength. The radiation used by radar ranges from 300 MHz to 15 GHz.
What is the range of wavelengths?
*Calculation:*
- **Frequency range**: \(4.286 \times 10^{-3} \text{m} \) - \(7.895 \times 10^{-2} \text{m} \)
**4.b. Size of Antennas**
If the antenna dimensions are comparable to the wavelength of the radiation used, what will be the approximate size range of antenna used for radar?
### 5. Imaging with Different Wavelengths
When used for imaging, the wavelength of the radiation needs to be smaller than the thing being imaged. To get a pretty good idea of what kind of radiation is needed to image something, assume that the wavelength must be the size of the object or smaller.
With this in mind, would visible light work well to image protozoa with a length of 10 micrometers? What about bacteria (about 1 micrometer)? How about a virus (about 0.1 micrometer)?
---
#### Explanation:
- **Protozoa (10 micrometers)**: Visible light, with wavelengths in the range of 400-700 nanometers (0.4-0.7 micrometers), is suitable for imaging protozoa as the wavelength is smaller than the protozoa.
- **Bacteria (1 micrometer)**: Visible light can image bacteria but might not provide the best resolution since bacteria are at the lower limit of visible light wavelengths.
- **Virus (0.1 mic](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fed0c5231-d007-48db-88ad-3cb0011ef002%2F7024d069-ec8a-4a72-8694-2917727a8ea5%2Fcizgflk_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### Understanding Radar and Imaging Technology
**3. Radar Pulse Timing**
One type of radar works by sending a pulse out to an object and timing how long it takes for the pulse to return after bouncing off of the object. If the radar is tracking a plane 100 km away, how long does it take from the time the pulse leaves the radar to the time it returns?
 \( t = \frac{d}{v} \)
### 4. Radar Antenna and Wavelengths
**4.a. Range of Wavelengths**
Radar antennas tend to be of comparable size to their wavelength. The radiation used by radar ranges from 300 MHz to 15 GHz.
What is the range of wavelengths?
*Calculation:*
- **Frequency range**: \(4.286 \times 10^{-3} \text{m} \) - \(7.895 \times 10^{-2} \text{m} \)
**4.b. Size of Antennas**
If the antenna dimensions are comparable to the wavelength of the radiation used, what will be the approximate size range of antenna used for radar?
### 5. Imaging with Different Wavelengths
When used for imaging, the wavelength of the radiation needs to be smaller than the thing being imaged. To get a pretty good idea of what kind of radiation is needed to image something, assume that the wavelength must be the size of the object or smaller.
With this in mind, would visible light work well to image protozoa with a length of 10 micrometers? What about bacteria (about 1 micrometer)? How about a virus (about 0.1 micrometer)?
---
#### Explanation:
- **Protozoa (10 micrometers)**: Visible light, with wavelengths in the range of 400-700 nanometers (0.4-0.7 micrometers), is suitable for imaging protozoa as the wavelength is smaller than the protozoa.
- **Bacteria (1 micrometer)**: Visible light can image bacteria but might not provide the best resolution since bacteria are at the lower limit of visible light wavelengths.
- **Virus (0.1 mic
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