plz help me by answering these questions...plz.......?

Question

1. CHEMISTRY-
cud anyone plz give me d balanced chemical equations involving the reactions of magnesium and aluminium with zinc sulphate?


2.PHYSICS-
when a ray of light undergoes refraction at the surface of separation of 2 different media,what happens to its wavelength?

THANKS IN ADVANCE TO ALL OF U WHO ANSWER......I'LL B VERY OBLIGED !!

Answer 1

Mg + ZnSO4 = MgSO4 + Zn

2Al + 3ZnSO4 = Al2(SO4)3 + 3Zn


when a ray of light undergoes refraction at the surface of separation of 2 different media, its wavelength will:
i) increase if it moves from deser to rarer medium
ii)decrease if it moves from rarer to denser medium

Answer 2

2) The wavelength decreases as the light enters the medium and the light wave changes direction.

http://acept.asu.edu/PiN/rdg/refraction/refraction.shtml

Answer 3

1.
Mg3 Al 2 + 3ZnSO4 => 3MgSO4 + Zn3Al 2

2 When a ray of light enters a high density medium from a low density medium its wave length increases.When it goes from a high density medium to a low density medium the wave length decreases.

Answer 4

mg+znso4=mgso4+zn
2al+3znso4=Al2(so4)3+3zn

2)if it goes to denser medium from rarer medium than wavelenth will increase and visa versa

Answer 5

i think:
the wavelengh dosnt change, the wavelengh determins what colour the ray is (ie. ultraviolate or visable or infra red) i think that stays the same, it is its frequency that changes and that will decrease in a denser median. and increase in a lighter meadian.

Answer 6

agree with miinii