frequencies, wavelength and speed calculations

As the wavelength of a wave increases, which is also true?

• The energy of the wave will increase.
• The speed of the wave will increase.
• The frequency of the wave will decrease.
• Planck's constant will decrease.

As a distant star moves away from Earth, the light given off by the star has a measurably lower frequency. What happens to the wavelength and energy of the photons of light when the frequency becomes lower?

• The wavelength becomes longer, and the energy decreases.
• The wavelength becomes shorter, and the energy decreases.
• The wavelength becomes longer, and the energy increases.
• The wavelength becomes shorter, and the energy increases.

Radio station A broadcasts a signal with a frequency of 98.7 MHz, and radio station B broadcasts a signal with a frequency of 100.3 MHz.  What can be said about the relationship of signal A to signal B?

• Signal A and signal B have the same energy.
• Signal A has more energy than signal B.
• Signal A has a shorter wavelength than signal B.
• Signal A has a longer wavelength than signal B.

Visible light occupies the range of wavelengths from 380 to 790 nanometers in the electromagnetic spectrum. Which of the following kinds of electromagnetic radiation has shorter wavelength than visible light?

• Infrared radiation
• Microwaves
• Radio waves
• X-rays

Calculate the wavelength of the yellow light emitted by the street light, if the frequency of the radiation is 5.10x10¹⁴Hz.

• 5.12 x 10^-7m

• 5.88 x 10^-7 m

• 4.20 x 10¹⁴m

• 3.0 x 10⁸m

Energy is measured in........

• Wavelength

• Meters

• Joules

• Frequency

Red light has a wavelength of 675 nm.  What is its frequency?

• 2.03x1011 m
• 4.44x1014 Hz
• 4.44x1014 nm
• 2.03x1011 Hz

The frequency of violet light is 7.5x1014 Hz.  What is its wavelength? 

• 4.0x10-7 m
• 4.0x107 m
• 2.25x1023m
• 2.25x1023 Hz

What is the speed of light?

• 3.0x10⁸ ms
• 3.0x10⁸ m/s
• 6.626x10^-34 Js
• 6.626x10^-34 J/s

• Nitrogen

• Oxygen

• Magnessium

• Carbon