What is the distance from the point (1, 8, 1) to the xz-plane? Solution the equation of the xz plane is y = 0, but you don\'t need it. n = <0,1,0> is the unit normal to the x-z plane v = <0,8,0> .... is an arbitrary vector from the x-z plane to (1,8,1) the minimum point-plane distance is the magnitude of the projection of v on n: d = |v·n| = 8 Answer: 8.

1. what is the distance that LDR sensor can detect ( what is the distance between LDR sensor and
the object that make the LDR change its status)
what is the distance that LDR sensor can detect ( what is the distance between LDR sensor and
the object that make the LDR change its status)
what is the distance that LDR sensor can detect ( what is the distance between LDR sensor and
the object that make the LDR change its status)
Solution
LDR means ligjt dependent resistors, its having resistance and it is changes when light is falling..
The light itensity is the inversely propotional to square of the distance from the light source. That
is, E=1/r^2.
here r is the distance between them