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1. A metal with a work function of 1.80 eV is illuminated with monochromatic light of energy 4.35 eV. What is the stopping potential modulus

1. A metal with a work function of 1.80 eV is illuminated with monochromatic light of energy 4.35 eV. What is the stopping potential modulus for this experiment?

2. A radio telescope with a diameter of 320 m is used to detect sources emitting waves of length 21.0 cm. What is the minimum angular separation between 2 different sources that this system could solve in degrees?

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