What is Lustre ?

What is Lustre ?
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1 Answer

Answer :

Lustre: Metals in their pure state have a shine and can be
polished to give a highly reflective surface.
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Give reason: Metallic articles which are exposed to air over long period of time lose their lustre.

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Less than 1 month after planting, my IlexCrenata "green lustre" plants are turning brown? Why?

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Why are there a wide range of colours, hardness, crystal forms, lustre and density found in minerals? -SST 10th

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(3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the latin lux, meaning "light", and generally implies radiance, gloss, or brilliance. Metals in general have high electrical conductivity, high thermal conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.

Description : (3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word ... conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.

Last Answer : Cloud is a colloidal dispersion of – (1) Air in a dispersion medium of water (2) Fog in a dispersion medium of water (3) Mist in a dispersion medium of air (4) Water drops in a dispersion medium of air

The main purpose of galvanising iron sheets is to (A) Harden the surface (B) Increase its glossiness and lustre (C) Prevent the action of water (D) Prevent the action of oxygen

Description : The main purpose of galvanising iron sheets is to (A) Harden the surface (B) Increase its glossiness and lustre (C) Prevent the action of water (D) Prevent the action of oxygen

Last Answer : (C) Prevent the action of water

Which of the following is not property of sodium metal? a) lustre b)hard c)low melting point d)solid at room temperature.

Description : Which of the following is not property of sodium metal? a) lustre b)hard c)low melting point d)solid at room temperature.

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The lustre of the metals is because of (1) high density, due to closed packing of atoms (2) high polish (3) reflection of light due to the presence of free electrons (4) absorption of light due to the presence of cavities

Description : The lustre of the metals is because of (1) high density, due to closed packing of atoms (2) high polish (3) reflection of light due to the presence of free electrons (4) absorption of light due to the presence of cavities

Last Answer : reflection of light due to the presence of free electrons