EM SPECTRUM, WAVELENGTH, FREQUENCY, AND ENERGY

 

1.) Look at the EM spectrum on p. iv of the reference tables to answer this question.

     As you move across the visible light spectrum from red to violet

(A)  Does the wavelength increase or decrease?

(B)  Does the frequency increase or decrease?

(C)  Does the energy increase or decrease?

 

2.) A beam of microwaves has a frequency of 1.0 x 109 Hz.  A radar beam has a frequency of 5.0 x 1011 Hz. 

     Which type (microwave or radar)…

(A)  has a longer wavelength?

(B)  is closer to visible light on the EM spectrum?

(C)  is closer to x-rays in frequency value?

 

3.) What is the frequency of an EM radiation wave if its wavelength is 3.6 x 10-9 meters?

 

4.) A beam of EM radiation has a wavelength of 4.257 x 10-7 cm.  What is its frequency?

 

5.) A photon of light has a wavelength of 3.20 x 105 meters.  Find…

          (A) the frequency

          (B) the energy

          (C) the region of the EM spectrum/type of radiation

 

6.) A photon has an energy of 4.00 x 10-19 J.  Find…

          (A) the frequency

          (B) the wavelength

          (C) the region of the EM spectrum/type of radiation

 

7.) A bright line spectrum contains a line with a wavelength of 518 nm.  Determine…

          (A) the wavelength in meters

          (B) the frequency

          (C) the energy

          (D) the color

 

*8.) Cobalt-60 is an artificial radioisotope that is produced in a nuclear reactor for use as a gamma ray source in the treatment of certain types of cancer.  If the wavelength of the gamma radiation from a cobalt-60 source is 1.00 x 10-3 nm, calculate the energy of a photon of this radiation.

 

 

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