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Threshold wavelength from the stopping potentials at two wavelengths

The same question, asked 12 times: 2 May 2023 S1*, 15 May 2023 S2*, 9 May 2024 S2*, 11 May 2024 S2*, 12 May 2024 S1*, 13 May 2024 S2*, 14 May 2024 S2*, 22 Apr 2025 S1*, 15 Apr 2026 S2*, 19 Apr 2026 S2*, 15 May 2026 S2*, 19 May 2026 S2. Every wording below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    2 May 2023 S1

    19
    When a metallic surface is illuminated with a radiation of wavelength λ\lambda, the stopping potential is VV. If the same surface is illuminated with radiation of wavelength 3λ3\lambda, the stopping potential is V6\frac{V}{6}. The threshold wavelength for the surface is

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  2. Question 2

    15 May 2023 S2

    26
    When a certain metallic surface is illuminated with monochromatic light wavelength λ\lambda, the stopping potential for photoelectric current is 4V04V_0. When the same surface is illuminated with light of wavelength 3λ3\lambda, the stopping potential is V0V_0. The threshold wavelength for this surface for photoelectric effect is

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  3. Question 3

    9 May 2024 S2

    7
    When a certain metal surface is illuminated with light of frequency vv, the stopping potential for photoelectric current is V0V_0. When the same surface is illuminated by light of frequency v2\frac{v}{2}, the stopping potential is V04\frac{V_0}{4}, the threshold frequency for photoelectric emission is

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  4. Question 4

    11 May 2024 S2

    6
    When a metallic surface is illuminated with radiation of wavelength 'λ\lambda', the stopping potential is 'V'. If the same surface is illuminated with radiation of wavelength '2λ2\lambda', the stopping potential is 'V4\frac{V}{4}'. The threshold wavelength for the metallic surface is

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  5. Question 5

    12 May 2024 S1

    36
    When light of wavelength λ\lambda is incident on a photosensitive surface the stopping potential is VV. When light of wavelength 3λ3\lambda is incident on same surface the stopping potential is V6\frac{V}{6}. Then the threshold wavelength for the surface is

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  6. Question 6

    13 May 2024 S2

    8
    When radiations of wavelength 'λ\lambda' is incident on a metallic surface the stopping potential required is 4.8 volt. If same surface is illuminated with radiations of double the wavelength then required stopping potential becomes 1.6 volt. Then the value of threshold wavelength for the surface is

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  7. Question 7

    14 May 2024 S2

    46
    When radiation of wavelength λ\lambda is incident on a metallic surface, the stopping potential is 4.8 V. If the surface is illuminated with radiation of double the wavelength the stopping potential becomes 1.6 V. The threshold wavelength for the surface is

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  8. Question 8

    22 Apr 2025 S1

    29
    When a photosensitive metal surface is illuminated with radiation of wavelength ' λ1\lambda_{1} ', the stopping potential is ' V1V_{1} '. If the same surface is illuminated with radiation of wavelength ' 3λ13\lambda_{1} ', the stopping potential is V16\frac{V_{1}}{6}. The threshold wavelength for the photosensitive metal surface is

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  9. Question 9

    15 Apr 2026 S2

    144
    When a metallic surface is illuminated with a radiation of wavelength 'λ\lambda', the stopping potential is 'V'. If the same surface is illuminated with radiation of wavelength 6λ6\lambda, the stopping potential is (V12)\left(\dfrac{V}{12}\right). The threshold wavelength for the surface is

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  10. Question 10

    19 Apr 2026 S2

    143
    When light of wavelength 'λ\lambda' is incident on a photosensitive surface, the stopping potential is 'V'. When a light of wavelength 1.5λ1.5\lambda is incident on the same surface, the stopping potential is 'V4\dfrac{V}{4}'. Threshold wavelength for the surface is

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  11. Question 11

    15 May 2026 S2

    144
    When a certain metal surface is illuminated with a light of wavelength λ\lambda, the stopping potential is VV. When the same surface is illuminated by light of wavelength 2λ2\lambda, the stopping potential is (V3)\left(\dfrac{V}{3}\right). The threshold wavelength for the surface is

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  12. Question 12

    19 May 2026 S2

    144
    When a metallic surface is illuminated with radiation of wavelength λ\lambda, the stopping potential is VV. If the surface is now illuminated with a radiation of wavelength 4λ4\lambda, the stopping potential (V8)\left(\dfrac{V}{8}\right). The threshold wavelength for the surface is

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