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A photon of wavelength 656.3nm is emitted in the Balmer series of a Hydrogen emission lamp. (a). Show that the frequency of the photon is 4.57*10^14 Hz. (b).Use the Planck-Einstein relationship to calculate the energy of the photon.

(a). Firstly, pull out useful information . λ=656.3nm Secondly, identify relevant equation and rearrange to find frequency. λ=c/f => f=c/λ Calculate frequency using the given values (c=3 10^8 m/s), ensuri...
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Answered by Robert M. • Physics tutor
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Why does first ionisation energy decrease as you go down a Group in the Periodic Table?

There are two reasons: increasing atomic size and increasing shielding effect. Increasing atomic size - As you go down the Group, the atom size becomes larger, therefore the electron that must be removed is ...
Answered by • Chemistry tutor
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How do I answer a describe question?

To answer a describe question, you must make statements containing facts which answer the question. For each correct statement that you make, you will receive 1 mark. You can also develop points by adding mo...
Answered by • Geography tutor
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What is the difference between a conformer and a regulator?

A conformer is an organism which is unable to regulate its own internal temperature, therefore, it's internal environment is dependent upon its external environment (e.g. lizards). Whereas a regulator is an ...
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Answered by Heather D. • Biology tutor
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Describe what is meant by the term mutualistic symbiotic relationship and provide an example of one.

A mutualistic symbiotic relationship is a relationship between 2 different species where both species benefit. For example, the relationship between a plant and its pollinators is a mutualistic symbiotic rel...
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Answered by Heather D. • Biology tutor
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