The sound gets louder as it gets closer and when it passes is gets softer
The source and the observer are moving towards each other. The observer is moving toward the source. The source is moving away from the observer
A would be the wavelength, C would be a crest, D would be the amplitude, leaving B which is the trough.
Answer:
A. The frequencies of EMR it emits depend on its temperature
B. It emits only one frequency of EMR
C. It absorbs most of the EMR it receives
Explanation:
- A blackbody is an object that absorbs most of the electromagnetic spectrum of energy that falls on it.
- According to law to reradiates most of the available energy back on top the outer space at an efficiency of 100% and thus radiation may be in the visible range of temperature than are in 1000K.
The answer is D, they reproduce quickly.
