Electromagnetic Radiation with a Wavelength of 640 Nm Appears as Orange

question 68

Multiple Choice

Electromagnetic radiation with a wavelength of 640 nm appears as orange light to the human eye.The frequency of this light is ________ s^-1.

• A)4.688 ×
• B)4.688 ×
• C)1.920 ×
• D)1.920 ×
• E)2.133 ×

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