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प्रश्न
Planck's constant is 6.6 × 10-34 Js. The momentum of each photon is given radiation Is 3.3 × 10-29 kg/s. The λ of radiation is ______.
पर्याय
2 × 1010 m
2 × 107 m
2 × 105 m
2 × 10-5 m
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उत्तर
Planck's constant is 6.6 × 10-34 Js. The momentum of each photon is given radiation Is 3.3 × 10-29 kg/s. The λ of radiation is 2 × 10-5 m.
Explanation:
`lambda = "h"/"p"`
`= (6.6 xx 10^-34)/(3.3 xx 10^-29)`
`= 2 xx 10^-5`m
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| Metal | Work function (in eV) |
| Potassium | 2.3 |
| Sodium | 2.4 |
| Calcium | 2.9 |
| Zinc | 3.6 |
| Silver | 4.3 |
| Aluminium | 4.3 |
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| Copper | 4.7 |
| Nickel | 5.0 |
| Gold | 5.1 |
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