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Find the range of frequency of light tha...

Find the range of frequency of light that is visible to an average human being `(400nmltlamdalt700nm)`

Text Solution

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The correct Answer is:
A, C, D
Given that: `400nmltlamda,700nm`
`1/(700nm)lt1/lamdalt1/(400nm)`
`1/(7xx10^-7)lt1/lamdalt1/(4xx10^-7)`
`=(3xx10^8)/(7xx10^-7)ltc/lamdalt(3xx10^8)/(4xx10^-7)`
`[where c=sped of light `=3xx10^8m/s`]
`rarr 4.3xx10^14ltc/lamdalt7.5xx10^14`
`rarr 4.3x10^14Hzltflt7.5xx10^14Hz`
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Knowledge Check

  • The range of wavelength of the visible light is

    A
    10 Å to 100 Å
    B
    4,000 Å to 8,000 Å
    C
    8,000 Å to 10,000 Å
    D
    10,000 Å to 15,000 Å

  • The range of wavelength of the visible light is

    A
    `10Å` to `100Å`
    B
    `4,000Å` to `8,000Å`
    C
    `8,000Å` to `10,000Å`
    D
    `10,000Å` to `15,000Å`

  • What is the frequency of light with a wavelength of 480 nm

    A
    `1.60 xx 10^(-6)s^(-1)`
    B
    `6.25 xx 10^(5)s^(-1)`
    C
    `6.25 xx 10^(14) s^(-1)`
    D
    `1.44 xx 10^(20) s^(-1)`

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