What is the relationship between energy and wavelength in the electromagnetic spectrum?

• They are inversely proportional.

• They are the same.

• They are unrelated.

• They are directly proportional.

In IR spectroscopy, what is often used instead of frequency?

• Wave number

• Photon count

• Amplitude

• Wavelength

What type of molecular motion involves changing the bond angle?

• Asymmetrical stretching

• Symmetrical stretching

• Rotating

• Bending

Why is the fingerprint region important in IR spectroscopy?

• It shows the speed of light in a vacuum.

• It identifies the color of a compound.

• It is unique to each molecule and helps in identifying compounds.

• It measures the temperature of a sample.

How does IR spectroscopy help in forensic science?

• By measuring the density of a material.

• By calculating the speed of sound in a medium.

• By identifying unknown substances through spectral matching.

• By determining the age of a sample.