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1.6.16 Sum to infinity of a geometric series (A-level only)

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Question 13

The total net flux of a pulsating radiation source is modeled as the sum to infinity of a geometric series, PPP. This sum is measured to be 7.5 units.

A phase-inverted secondary source is monitored where each discrete flux pulse, jnj_njn​, is related to the corresponding pulse in the first source, ini_nin​, by the linear relationship jn=−2.4inj_n = -2.4 i_njn​=−2.4in​ for all n≥1n \ge 1n≥1.

Determine the total net flux of the secondary radiation source.

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1.6.16 Sum to infinity of a geometric series (A-level only) Questions

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