Examples of reflection. Plane wave, plane surface. The phase of the reflected sound waves from hard surfaces and the reflection of string waves from their ends determines whether the interference of the reflected and incident waves will be constructive or destructive.
The tendency to develop allergies is often hereditary, which means it can be passed down through genes from parents to their kids. But just because you, your partner, or one of your children might have allergies doesn't mean that all of your kids will definitely get them, too.
Symptoms of Lactose Intolerance vs. Milk Allergy. Lactose intolerance can be genetic, or it can be caused by damage to the small intestine due to a viral or bacterial infection, Dr. Barto explains. Itâs also fairly common, and more so in certain populations.