Glass Is Opaque to Wave Frequencies That

question 39

Multiple Choice

Glass is opaque to wave frequencies that

• A)match its natural frequencies.
• B)are below its natural frequencies.
• C)both of these
• D)none of these

---

Definitions:

Excitation

The process of supplying electrical current to the field windings of a motor or generator, stimulating it to generate a magnetic field or to operate.

Activating

The process of making a device or system operational, such as by applying electrical power or enabling its functions through a control mechanism.

Abolition Laws

Legislation aimed at ending the practice of slavery, with significant examples including the British Slavery Abolition Act of 1833 and the Emancipation Proclamation in the US.

Maryland

A region situated in the Mid-Atlantic area of the U.S., renowned for its important historic locations and being the origin of the national anthem.