Consider a laser pointer and cellphone, as shown below.
8.1 State the type of electromagnetic radiation that is emitted by the:
8.1.1 Laser pointer (1)
8.1.2 Cellphone (1)
8.2 A laser pointer uses red light photons with a wavelength of 620 nm.
8.2.1 Define the term photon. (2)
8.2.2 Calculate the energy of a red light photon. (6)
8.2.3 Refer to the answer to QUESTION 8.2.2. Explain why it is very dangerous to shine a laser pointer into a person’s eyes. (2)
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