The reflector is the surface of a medium of greater density than that through which the incident sou â¦ nd travels, and it can be the surface of water, or a density-boundary caused by sharp temperature or salinity differences in the sea.
A typical ham and cheese sandwich provides nearly 16 grams of fat. An egg and cheese sandwich provides nearly 400 calories and 20 grams of fat and a peanut butter and jelly sandwich provides about 350 calories (although you can make a healthier peanut butter and jelly sandwich).
The serving size, which is typically one to three slices, varies by manufacturer and type of bread. One slice of standard white sandwich bread contains approximately 50 calories, 1 gram of fat, 115 milligrams of sodium, 10 grams of carbohydrates and 4 grams of protein.