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6 May, 14:57

The red light from the ant passed into the lens

As the light enters the lens, state what happens to

1. Its wavelength

2. Its frequency

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Answers (1)
  1. 6 May, 15:10
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    When red light enters the lens its wavelength decreases but its frequency remains the same.

    Explanation:

    Lens is made of glass which is a denser medium when compared with air. Thus light will undergo refraction and bend toward the normal. On entering a denser medium from rarer medium the speed of light decreases.

    Speed, frequency and wavelength of an electromagnetic wave are related according to the equation.

    v=ϑλ

    Where is v is the frequency, λ is the wavelength and v is the speed of the em wave.

    On entering the lens the wavelength of the red light as well as speed decreases but the frequency remains the same.
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