A HeNe laser beam (540 nm) travels from air into a piece of glass (index of refraction = 1.52). Determine the following ( both outside and inside the glass): a. Speed b. Wavelength c. Frequency d. Period e. Energy (eV) f. Energy (J) g. Discuss which quantities are changing and which are constant. Explain.

Radio telescopes are telescopes used for the detection of radio emission from space. Because radio waves have much longer wavelengths than visible light, the diameter of a radio telescope must be very large to provide good resolution. For example, the radio telescope in Penticton, BC in Canada, has a diameter of 26 m and can be operated at frequencies as high as 6.6 GHz. (a) What is the wavelength corresponding to this frequency? (b) What is the angular separation of two radio sources that can be resolved by this telescope? (c) Compare the telescope’s resolution with the angular size of the moon.

The wavelength of light emitted by a Carbon Dioxide laser is 10.6 micrometers. a) What is the frequency of the light and b) What part of the EM Spectrum is it. Look in the middle of the chart for the Type of Radiation where you see Radio Waves, Microwaves... etc. to make your selection? c) What are some detectable Objects at this frequency.

A certain photon of red light has a wavelength of 462 nm.  What is the speed of this photon?