Consider the three electromagnetic waves shown below. Identify the wave with the lowest intensity.

A sample of an unknown element was burned and emitted light with a frequency of 1311 THz. What is the identity of the element in the sample? Use the following information:

Element      Characteristic Wavelength (nm)
Al                 396.152
As                189.042
Ca                422.673
Cd               228.802
Cr                267.716
Cu               324.754
Fe                259.652
Hg               253.652

Heavy elements emit characteristics X-ray when their electrons undergo transitions. Shown below are the wavelengths of x-rays emitted by some elements:

Element          Wavelength (Å)
Cr                     2.291
Fe                     1.937
Co                    1.790
Cu                    1.542
Mo                    0.7107 

If a particular element emits an X-ray with a wavelength of 1.662 Å, determine the identity of the element. Hint: Plot the square root of ν versus the atomic number of the element.

Calculate the time it takes for light from the moon to reach the Earth if their distance is 384,400 km.

Find the corresponding energy of a photon for each of the following frequencies:

a. 2.2 GHz
b.  4.2 THz
c. 102.5 MHz

Which photon of light in each set has the highest amount of energy?

(i) A = 7.12×10¹¹ Hz, B = 1.33×10¹⁵ Hz, C = 2.02×10¹² Hz

(ii) X = 550 nm, Y = 326 nm, Z = 428 nm

Ultraviolet radiation and radiation of shorter wavelengths can damage biological molecules because these kinds of radiation carry enough energy to break bonds within the molecules. A typical carbon–carbon bond requires 348 kJ/mol to break. What is the longest wavelength of radiation with enough energy to break carbon–carbon bonds?

Identify the false statement and correct it. 

A. Ultraviolet light has a smaller wavelength than microwaves.

B. The glow from burning wood, black lights, and radio frequencies, are all forms of electromagnetic radiation. 

C. The wavelength of radiation decreases as the frequency increases. 

D. The speed of electromagnetic radiation in a vacuum increases as the frequency of the light increases.

Arrange the following electromagnetic radiation from shortest to longest wavelength

Green Light, Gamma Rays, Red Light, Microwaves, Infrared Light, Ultraviolet Light, Radio Waves, X-rays

Which of the following can eject the most number of electrons from a metal sample if the work function of the metal sample is 360 kJ/mol?

A photon with a wavelength of 0.332 nm strikes a surface. The emitted electron has a kinetic energy of 844 eV. What is the binding energy of the electron in kJ/mol? [KE = 1/2 mv²; 1 electron volt (eV) = 1.602 × 10^-19 J]

Determine the de Broglie wavelength of a proton traveling at the speed of light and identify the region in the electromagnetic spectrum for this wavelength.