Build a Photophone

Alexander Graham Bell did not consider the telephone to be his greatest invention. This video takes a look at this remarkable man and what he considered to be his greatest invention: the photophone.

• #education
• #photophone
• #alexander_graham_bell
• #first_telephone
• #first_long_distance_phone_call
• #paris_ontario
• #brantford_ontario
• #build_a_telephone
• #baddeck
• #selenium
• #ldr
• #photo_resistor
• #sound_experiment
• #physics_field_of_study
• #reflection