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7. Discuss the FLRW closed cosmological model and explain why this model describes the oscillating universe? 8. Write short notes on: (i) Particles Horizon

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7. Discuss the FLRW closed cosmological model and explain why this model describes the oscillating universe? 8. Write short notes on: (i) Particles Horizon (ii) Event Horizon For FLRW universe. Discuss the gravitational collapse of a homogeneous dust ball for the given metric == ds = dt - e dr - e" (de + sin 20 do) Where w= = w(t,r), = u(t,r)

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