find the ratio

JEE Main 2015 Online › Optics questions › find the ratio

a ray of light is incident on concave mirror . it is parallel to principal axis and its height from principal axis is equal to focal length of mirror. the ratio of distance of point B to distance of the focus from centre of curvature is?

#Physics #Optics

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6 Answers

varun.tinkle ·2009-10-18 09:26:31

i think it should be 1 but its too simple an answer to be true

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abhishek upadhyay ·2009-10-23 19:49:46

no, consider the marginal case

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iitimcomin ·2009-10-23 19:58:21

2/3

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iitimcomin ·2009-10-23 20:19:42

wats the answer given abhishek?[7]

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abhishek upadhyay ·2009-10-23 20:33:52

2/root(3)

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Harish Sridhar ·2019-01-08 23:04:58

The correct answer is 2/root(3).

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Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω

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find the ratio

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