Electromagnetic Spectrum

Infrared was discovered by whom and what year?

• William Herschel – 1800

• William Herschel – 1840

• William Thomson – 1860

• William Crookes – 1810

The following are applications of microwaves, EXCEPT one:

• Heat Sources

• Satellite

• Thermal Imaging

• Communications and Radar

According to Encyclopedia Britannica, microwaves range from 30 centimeters to 1 millimeter

• True

• False

Infrared radiation includes: I. Thermal Imaging II. Cool Astronomy III. Satellites IV. Seeing through dust

• I only

• I, II, III

• I, II, IV

• All of the above

What best describes this sentence “Infrared waves have longer wavelengths than visible light and can pass through dense regions of gas and dust in space with less scattering and absorption."

• Thermal Imaging

• Seeing through dust

• Cool Astronomy

• Infrared Radiation

Who is the person in the picture?

• Sir Isaac Newton

• Wilhelm Roentgen

• Johann Ritter

• Marie Curie

What is the energy beyond the violet end of the visible spectrum?

• Infrared

• X-rays

• Gamma Rays

• Ultraviolet

What is the main offender in the feeling of destructive effects of the sun’s rage?

• Infrared

• Visible Light

• Ultraviolet

• All of the above

X-rays has two applications: Diagnostic and Therapeutic

• The statement is true

• The statement is false

• Neither true or false

• Cannot be determined

In 1801, Johann Ritter conducted an experiment to investigate the existence of energy beyond the violet end of the visible spectrum. Knowing that photographic paper would turn _______ more rapidly in ______ light than in ______ light.