An electromagnetic wave emmited by a lithium lamp has a period of 1.54×10to the power-15s Calculate the frequency of this wave

Which of the following are guidelines to follow for obtaining accurate observations

What types of radiation make up the electromagnetic spectrum?

Amagnetically soft material is placed in a strong magnetic field. what is the most likely outcome? it will become a permanent magnet because the domains will remain aligned. it will become a temporary magnet because the domains will remain aligned. it will become a permanent magnet because the domains will easily realign. it will become a temporary magnet because the domains will easily realign.