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Sahay Sir > Question Answers > NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions > Physics > Chapter 29 - Dual Nature of Matter and Radiation > Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The stopping potential is measured material to be 3.57 V. The threshold frequency of the material is

Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The stopping potential is measured material to be 3.57 V. The threshold frequency of the material is

Pick the wrong answer in the context with rainbow.