**Q1)Calculate the frequency of each of the following wave lengths of electromagnetic radiation.**

**Part A**

**12.24 cm (wavelength of microwave oven)**

**Part B**

**0.0520 nm (a wavelength contained in medical X-rays)**

**Q2)Calculate the energy of a photon of electromagnetic radiation at each of the following frequencies.**

**Part A**

**102.2 MHz (typical frequency for FM radio broadcasting)**

**Express your answer in joules using four significant figures.**

**Part B**

**834.9 MHz (common frequency used for cell phone communication)**

**Express your answer in joules using four significant figures.**

**Q3)A heat lamp produces 25.0 watts of power at a wavelength of 6.0 μm .**

**Part A**

**How many photons are emitted per second? (1 watt = 1 J/s)**

**Express your answer using two significant figures.**

**Q4)What is the de Broglie wavelength of an electron traveling at 1.05×105 m/s ?**

**Express your answer with the appropriate units.**

**Answer:**