When light falls on a soap bubble or on the oily film spread on a water puddle, a spectrum of colors is observed. How is this spectrum of colors formed? 1) separation of white light by a prism 2) absorption of colors in a pigment present 3) constructive and destructive interference of light waves 4) reflection of light by soap bubble or oil film
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Answer:
Option 3) Constructive And destructive interference of light waves
Explanation:
When the light is incident on a soap bubble of certain thickness it constructively interferes for wavefronts which are in phase to produce white light and when the wavefronts are out of phase, they undergo destructive interference to produce a series of colors. Thus, interference is the reason.
Related Questions
A 139 kg physics professor has fallen into the Grand Canyon. Luckily, he managed to grab a branch and is now hanging 89 m below the rim. A student (majoring in linguistics and physics) decides to perform a rescue/experiment using a nearby horse. After lowering a rope to her fallen hero and attaching the other end to the horse, the student measures how long it takes for the horse to pull the fallen physicist to the rim of the Grand Canyon. The acceleration of gravity is 9.8 m/s 2 . If the horse’s output power is truly 1 horsepower (746 W), and no energy is lost to friction, how long should the process take? Answer in units of s.
The portion of a light ray that falls on a surface is a/an A. reflected ray. B. diffuse reflection. C. specular reflection. D. incident ray.
A Block slides down an incline that makes an angle of 30? with the horizontal direction. The coefficient of kinetic friction between the incline and the block is µk = 0.3i) Determine the acceleration of the block.ii) The block starts at rest from a height of 8m above the ground. What is the speed of the block when it reaches the bottom of the incline.
If you mix 40.0 ml of a 0.200 m solution of k2cro4 with an aqueous solution of agno3, what mass of solid forms? (hint: most chromates are insoluble.)
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The size (radius, diameter) of stars is typically described
in terms of miles or kilometers.
The mass and volume of stars are described in kilograms and
cubic meters respectively, with scientific notation for the huge numbers.
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Answer:
This is because the cloth soaked in water can absorb and evaporate the heat from your forehead.
Explanation:
This technique is used to cool down your fever, and to help you feel better.
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Answer:
Battery is the source of electrical energy which will help the charge to flow through a medium.
Battery is a constant source of potential difference which will create constant potential difference across the ends of a conductor where it is connected.
When a charge is passed through the constant potential difference then the change in electrostatic potential energy will give kinetic energy to the charge.
It is given as
so here charge will continuously flow through the conductor across which potential difference is applied by the battery. This constant motion or flow of charge is known as electric current.
c. surface currents
b. evaporation
d. freezing Please select the best answer from the choices provided A B C D
Answers
Answer:
Surface currents
Explanation:
The water at the ocean surface is moved by the winds which blows in certain pattern due to earth spin and Coriolis effect.wind is able to move top layer of ocean up to 400 m creating surface ocean current.
Ocean current carry warmth of water to higher Latitudes thus making the climate of that region less chilly.
c. surface currents
B) Earth's geographic north pole is actually a magnetic south pole.
C) Earth's geographic south pole is also a magnetic south pole.
D) The north poles of two bar magnets will attract each other. Scientists have evidence that single isolated magnetic poles, called magnetic monopoles, exist.
E) The south poles of two bar magnets will repel each other.
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Answer:
A) The north pole of a bar magnet will attract the south pole of another bar magnet.
B) Earth's geographic north pole is actually a magnetic south pole.
E) The south poles of two bar magnets will repel each other.
Explanation:
According to classical physics, a magnetic field always has two associated magnetic poles (north and south), the same happens with magnets. This means that if we break a magnet in half, we will have two magnets, where each new magnet will have a new south pole, and a new north pole.
This is because for classical physics, naturally, magnetic monopoles can not exist.
In this context, Earth is similar to a magnetic bar with a north pole and a south pole. This means, the axis that crosses the Earth from pole to pole is like a big magnet.
Now, by convention, on all magnets the north pole is where the magnetic lines of force leave the magnet and the south pole is where the magnetic lines of force enter the magnet.
Then, for the case of the Earth, the north pole of the magnet is located towards the geographic south pole and the south pole of the magnet is near the geographic north pole.
And it is for this reason, moreover, that the magnetic field lines enter the Earth through its magnetic south pole (which is the geographic north pole).
Answer:ITS what that man said
Explanation:
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Scientists know that seismic waves can be either compressional or transverse because there are horizontal and vertical movements during an earthquake. Horizontal movements are compressional while vertical movements are transverse.
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