Chemistry - 5.3 - Emission Spectra and the Quantum Model (1)

A. Visible light

B. Microwaves

C. Radio waves

Which of the various types of electromagnetic waves, listed above, move through air at approximately 3.0 x 10⁸ m/s? So fast, that it travels around Earth approximately seven times in one second.

• A. only

• B. only

• C. only

• A., B., and C.

A. Visible light

B. Microwaves

C. Radio waves

Which of the various types of electromagnetic waves, listed above, has a wavelength of approximately 300 meters?

• A. only

• B. only

• C. only

• A., B., and C.

A. Visible light

B. Microwaves

C. Radio waves

Which of the various types of electromagnetic waves, listed above, has a wavelength of approximately 6 millimeters?

• A. only

• B. only

• C. only

• A., B., and C.

A. Visible light

B. Microwaves

C. Radio waves

Which of the various types of electromagnetic waves, listed above, are we able to visually see with our eyes?

• A. only

• B. only

• C. only

• A., B., and C.

What is the relationship between the energy and the frequency of electromagnetic radiation?

• Direct relationship: as one increases, so does the other

• Inverse relationship: as one increases, the other decreases

Microwaves are used to cook food and transmit information. What is the wavelength of a microwave that has a frequency of 3.44 x 10⁹ Hz?

• 8.72 x 10^-2 m

• 8.72 x 10² m

• 8.72 x 10¹⁷ m

• 8.72 x 10^-1 m

Objects get their colors from reflecting only certain wavelengths (i.e. certain colors) when hit with white light. Light reflected from a green leaf is found to have a wavelength of 4.90 x 10^-7 meters. What is the frequency of the light?

• 6.12 x 10¹⁴ Hz

• 1.63 x 10^-15 Hz

• 147 Hz

• 6.80 x 10^-3 Hz

X-rays can penetrate boy tissues and are widely used to diagnose and treat disorders of internal body structures. What is the frequency of an X-ray with a wavelength of 1.15 x 10^-1 nanometers?

• 2.61 x 10¹⁸ Hz

• 3.83 x 10^-19 Hz

• 3.45 x 10^-2 Hz

• 2.90 x 10¹ Hz

After careful analysis, an electromagnetic wave is found to have a frequency of 7.8 x 10⁶ Hz. What is the speed of the wave?

• 3.0 x 10⁸ m/s

• 3.85 x 10¹ m/s

• 2.34 x 10¹⁵ m/s

While an FM radio station broadcasts at a frequency of 94.7 MHz, and AM station broadcasts at a frequency of 820 kHz. What is the wavelength of the FM broadcast?

• 3.17 x 10⁹ nm

• 3.17 nm

• 3.70 x 10¹¹ nm

• 370 nm

• 2.84 x 10¹⁶ nm