Semiconductor materials are ostensibly little band hole encasings. The characterizing property of a semiconductor material with pollutions that adjust its electronic properties controllably. Most ordinarily utilized semiconductor materials are crystalline inorganic solids.
        
             
        
        
        
B, C, D, B
I hope these are right, hope this helped.
        
             
        
        
        
Answer:
An electromagnetic wave is a wave that can travel through empty space and through matter.
Explanation: