Answer:
The answer is D) Transverse
Explanation:
Electromagnetic waves which are in transverse (by nature) can travel withought a medium.
 
        
                    
             
        
        
        
Answer: Yes this chemical reaction obeys the laws of physics. Its very simple, let me explain.
Explanation:
When Iron(Fe) oxidizes it gains three oxygen atoms so it reacts to form Fe2O3 so it becomes bigger or explands. Its also sometimes called "oxide jacking".
 
        
             
        
        
        
D) some of the light passes through and some of the light is reflected by the object
        
                    
             
        
        
        
I think most scientists would not respect this researchers claim.
It doesn't seem like the researcher followed the steps of the scientific method.
1.) Making an observation.
2.)Asking questions.
3.)Forming a hypothesis.
4.)Conducting an experiment.
5.)Analyzing Data.
6.)Drawing a conclusion.
7.)Showing work to others.
Publishing his/her work would be the very last step after completing everything else. 
        
                    
             
        
        
        
Every time I would say, but often is the answer as theory should be revised, and also done practically so that you don’t forget the concepts