Answer:
The energy of photon is 20.22×10⁻¹⁷ J
Explanation:
Given data:
Frequency of photon = 3.05×10¹⁷ Hz
Energy of photon = ?
Solution:
Formula:
E = hf
h = planck's constant = 6.63×10⁻³⁴ Js
Now we will put the values in formula.
E = 6.63×10⁻³⁴ Js × 3.05×10¹⁷ Hz
Hz = s⁻¹
E = 20.22×10⁻¹⁷ J
Thus, the energy of photon is 20.22×10⁻¹⁷ J
The answer will be Zn , that is zinc is the best metal to protect iron.
The iron corrosion can be protected by various method in which zinc, Zn is used.
1. Gavanization:
In this method iron that is Fe is coated with zinc that is Zn. Zinc is more prone to oxidation than iron so it will oxidise and thus protects iron .
2. Cathodic protection:
In this method, Zinc or magnesium is used to protect iron, these metals are electrically connected to the iron. The more active metal that is zinc or magnesium over here is the sacrificial anode. And the iron metal is the cathode that remains unoxidized.
Some of the colors are absorbed and some are reflected. When white light shines on a white object, all colors are reflected; whereas; when white light strikes a black object, all colors are absorbed.
Explanation:
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Answer:
The process in which energy is emitted by one object ,transmitted through .......