When the distance from a light source is doubled, the light intensity at that point will:Select one:a.Doubleb.Stay the samec.Reduce to one quarterd.Halve

Doubling the distance between sound source and a listener will change the intensity, as detected by the listener, by what factor?Select one:a.2b.1/4c.4d.1/2

How do you double the amount of light going into the camera using shutter speed?Double the Shutter speedDivide the current shutter speed in halfSubtract the shutter speed fro one second.

In a street two lamp posts are 600 feet apart. The light intensity at a distance d from the first (stronger) lamp post is 1000/d 2 , the light intensity at distance d from the second (weaker) lamp post is 125/d 2 (in both cases the light source). The combined light intensity is the square of the distance to the light coming from both lamp posts.(i) If I(x) denotes the combined light intensity, then find the value of x so that I(x) is minimum.(ii) Find the darkest spot between the two lights.

Thetablebelowshowsthelightintensityin4differentsituationswherealampisplacedatacertaindistancefromaplant.Situation Light intensity [lumen/cm²]1 0.322 0.633 0.174 0.9Calculatethedistancebetweenthelampandtheplantinsituation4.Giveyouranswerto3significantfigures.

two point sources s1 and s2 separated by distance 3lamda . both sources are place at distance L from the wall d<<L and are having equal intensities . find all the point on wall where light intensity will be zero .