John wants his secret clubhouse to have a wall covered with a material that will allow him to see people approaching from around a corner. What kind of material would be best to use? 1. Material that is translucent 2. Material that is reflective 3. Material that is transparent 4. Material that is opaque
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Ответ:
Answer
Correct answer is thermogram
Explanation
Themogram is used for thermography. Infrared thermography is used to detect heat patterns of the light rays which comes in the infrared region of spectrum. Infrared light rays are not visible to the unaided eye.