Iron is protected by coating it with a t...

Iron is protected by coating it with a thin layer of:

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A glass of refractive index 1.5 is coated with a thin layer of thickness t and refractive index 1.8 . Light of wavelength lambda travelling in air is incident normally on the layer. It is partly reflected at the upper and the lower surfaces of the layer. It is partly reflected at the upper and the lower surfaces of the layer ant the two reflected rays interface . If lambda = 648 nm , obtain the least value of t ("in" 10^(-8)m ) which the rays interface constructively.

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VK JAISWAL ENGLISH-d-BLOCK ELEMENTS-ASSERTION-REASON TYPE QUESTIONS

Iron is protected by coating it with a thin layer of:
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Assertion: Melting point of Mn is more than that of Fe. Reason : Mn ...
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Cu((aq.))^+ has less stable nature than Cu((aq.))^(2+) but Fe((aq.))^(...
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Assertion: Zn gives H(2) gas with dil. HCl and also with dil. H(2)SO(4...
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Assertion: KMnO(4) has different equivalent wieghts in acid, neutral o...
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Assertion: Cu^(2+) is more stable than Cu^(+) Reason: Electrode pote...
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Statement 1: Concentrated solution of CuCl(2) in water is yellow in co...
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Assertion: KMnO(4) is purple in colour due to charge transfer . Reas...
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Assertion : CrO(3) reacts with HCl to form chromyl chloride gas Reas...
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Mercury is the only metal which is liquid at 0^(@)C. This is due to it...
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Assertion: CuSO(4)*5H(2)O and FeSO(4)*7H(2)O are blue and green colour...
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Assertion: FeSO(4) and Fe(2)(SO(4))(3) undergoes intramolecular redox ...
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Assertion: Zn(OH)(2) is dissolved in both NH(4)OH and NaOH solution Re...
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Assertion: Increasing order of covalent character among given compound...
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Assertion: AgNO(3) reacts with KCN to form white ppt. of AgCN. This wh...
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Assertion: Zero and negative oxidation state of d-block metal ion are ...
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Assertion: Aquated copper(I) cation undergoes disproportionation as: ...
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Assertion: Melting point of Mn is more than that of Fe. Reason : Mn ...
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Assertion: Cu^(2+)(aq) is less than Cu^(3+)(aq) but Fe^(3+) is more st...
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Assertion: Zn gives H(2) gas with dil. HCl and dil. H(2)SO(4) but not...
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Assertion: KMnO(4) has different equivalent wieghts in acid, neutral o...
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