which of the following occurs as light travels far...
which of the following occurs as light travels farther from its source? (1 point)a. far from the source, photons come together in a small area.b. the intensity of light increases as photons move away from the source.c. the source gives off less light as photons move away from it.d. far from the source, photons spread over a larger area.
we are required to state the effect of one of the laws governing brightness. apparent brightness:b=l4πd2 where b is apparent brightness, l is intrinsic luminosity, and d is the distance from the source. [readmore]as the distance increases, the apparent brightness gets fainter as the distance from the source increases. the fainting brightness is accounted for by the spreading out of photons: as light travels away from its source, the photons get spread out over increasingly greater areas. the more the light is spread out, the fainter it appears in any given patch of area (for example, the small patch of the area covered by the opening in your eye)the correct choice is:d. far from the source, photons spread over a larger area.
as the distance between the source and the metal is increased, the intensity of light decreases becausealso, the photocurrent is directly proportional to the intensity of light and also to the number of electrons emitted.hence, the curve d is the appropriate curve representing above equation. flying insects use the sun or the brightest light source as a reference for navigation. the sun or moon work nicely since they are a great distance away making the light rays, for all practical purposes (like navigation), parallel to each other. the insect observes the angle of the point of light as it starts its journey and returns simply by flying the reciprocal or opposite angle for the same length of time.

the problem for the insect comes when it uses a nearby source of light such as a light bulb as it navigates. the rays from a bulb are no longer strictly parallel since light is emitted from all points of a relatively large global surface of the bulb. as the insect tries to maintain a constant light-to-eye angle it has to make constant corrections by turning in flight. this results in a spiraling flightpath bringing it closer and closer to the bulb until they are, shall we say "overcome by the heat", or they run into the window glass. this happens because the speed of light is faster in air then that of the speed of sound. when a ray of light falls on a smooth and shiny surface, the whole of light is sent back in the same direction. it is called reflection. mirrors do not allow even a small amount of light to pass through them. mirrors show regular and complete reflection.when all the parallel rays reflected from a plane are not parallel, the reflection is diffused or irregular. this is not violation of law of reflection, the reason for diffused reflection is due to irregularities in the reflecting surface. Photography is the process of making pictures (graph) using light (photo)...  
Light takes the most important role on produce nice pictures  
  
There`re no fixed rules about photography, it`s an art so nobody have rights to say that the photo is good or bad...  
  
During rainy day, you should prepare camera`s water-proof jacket or an umbrella to protect it against water. Some expensive cameras have been equipped with water-proof material. dear student,
we know that,after the discovery of electrons, we got to know that
electrons are the particles that flow in a conductor electrons
being the negatively charged particles flow from the negative
terminal to the positive terminal and for current now, electric or
conventional current is the rate of flow of charge so, the
direction of the current should be same as the direction of the
charge, i e positive charge(conventionally), so the direction is
opposite to the flow of the negative charge(flow of electrons)
hence, the direction of the flow of electrons is opposite to the
direction of electric(or conventional) current
regards (a) to my eye, they never have a common speed. that would require the two curves to have the same slope at the same time, which doesn't appear to me to be true.

(b) b is ahead of a but is slowing down and being passed by a, which has been moving at constant speed.

(c) b has an acceleration with greater magnitude. (in fact, the curve for a doesn't show any acceleration at all.)

(d) a has a constant slope, and therefore a constant velocity (and therefore displays no acceleration at all). b starts ahead of a initially with a velocity greater, but then decelerates as it nears t = 4 s. at around t = 3.7 s, b's velocity (slope) has nearly dropped to zero, and it gets passed by a.

if you find this helpful, please select favorite answer! hot flashes can exist for a number of reasons. a true hot flash usually is very specific and results from a loss of hormones. however, women who have fluctuations of hormones like exists in pregnancy can have similar symptoms. see more... (i) adsorption is a surface phenomenon that causes the accumulation of molecules of a substance at the surface of a solid or liquid rather than in the bulk. in adsorption, the substance gets concentrated at the surface only. it does not penetrate through the surface to the bulk of the solid or liquid. for example, when a chalk stick is dipped into an ink solution, only its surface becomes coloured.


on the other hand, the process of absorption is a bulk phenomenon. in absorption, the absorbed substance gets uniformly distributed throughout the bulk of the solid or liquid. for example, when a sponge is dipped in water the whole sponge gets wets.


(ii)according to the schulze-hardy rule, the effectiveness of the salt causing flocculation depends on the charge on the ion of opposite sign to the charge on the sol particles. the greater the magnitude of the opposite charge, the higher the ability of a salt to coagulate the sol.  
thus, trivalent salt alcl3 is more effective in causing the coagulation of a negatively charged sol than divalent salt mgcl2.


(iii)out of sulphur sol and proteins, sulphur sol forms multimolecular colloids. sulphur sol consists of particles containing a thousand or more s8 molecules. on the other hand, proteins form macromolecular colloids. a) have
b) of
c) from
d) tried
e) away
f) at