Astrophysics question: Wire mesh radio telescope antenna

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bonbon22
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Homework Statement
https://downloads.umutech.net/Physics/Past_Papers/PA05/Astro/QP/physics_u5_astro_qp_jan_2003.pdf
question 3a also image below
Relevant Equations
Rayleigh criteria equation
244199

The answer says its 1 meter i don't understand how they arrived at this, The mark scheme suggests that the 50mm is the resolving power or Rayleigh criteria?

https://downloads.umutech.net/Physics/Past_Papers/PA05/Astro/MS/physics_u5_astro_ms_jan_2003.pdf
 
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bonbon22 said:
Problem Statement: https://downloads.umutech.net/Physics/Past_Papers/PA05/Astro/QP/physics_u5_astro_qp_jan_2003.pdf
question 3a also image below
Relevant Equations: Rayleigh criteria equation

View attachment 244199
The answer says its 1 meter i don't understand how they arrived at this, The mark scheme suggests that the 50mm is the resolving power or Rayleigh criteria?

https://downloads.umutech.net/Physics/Past_Papers/PA05/Astro/MS/physics_u5_astro_ms_jan_2003.pdf
anyone know very confused.