Answer:
f λ = c = 3.00E8 frequency * wavelength = speed of light
λ = c / f = 3.00E8 / 4.0E14 = 7.5E-7 m
Note 1 angstrom = 1.00E-10 m and 1 milli-micron = 1.00E-9 m
So the wavelength would be 7500 angstroms
The visible spectrum is 4000 A - 7000 A or 400 - 700 milli-microns
Answer:
B) The current of the entire circuit is lowered.
Explanation:
There are two ways in which a resistor can be connected in a circuit;
i) Series: In a series connection, resistors are connected end to end. In this arrangement, the current passing through each resistor is the same while the potential difference across each resistor is different.
ii) Parallel: In a parallel connection, resistors are connected to common junctions. In this arrangement, the potential difference across each resistor is the same while the current across each resistor varies.
In a series circuit, the effective resistance is the algebraic sum of resistance of all the resistors connected in series. Hence, if a large resistor is connected in series, the effective resistance of the circuit is greatly increased.
Since the voltage is given by;
V=IR (Ohm's law)
Where R is the effective resistance
Then;
I = V/R
If R becomes very large due to a large resistance connected in series, then the current of the entire circuit is lowered.
Answer:
The bohr's model is the primitive model for the hydrogen atom, comparatively to the atom of valence shell. And it is derived from the hydrogen atom of the first approximation by using the quantum mechanics.
Basically, the model state that the electron revolved around in circular orbit in atom around the central nucleus. And it can be fixed in the circular orbit at the set of discrete distance at the nucleus.
Answer:
perihelion
Explanation:
The point at which a planet is closest to the sun is called perihelion. The farthest point is called aphelion
