Light rays from an object after passing through a convex lens form an image at the focal point behind the lens (opposite side of the object). what is the actual position of the object? at the focal point in front of the lens at twice the focal length between the focal point and twice the focal length at a great distance, effectively infinite between the focal point and the lens nextreset

effectively infinite between the focal point and the lens

Explanation:

Light rays from an object after passing through a convex lens form an image at the focal point behind the lens (opposite side of the object).

Now from lens formula we know that

now we know that image forms at focal point

so we will have

now from the equation above

so we will have

so position of object is at infinite distance from lens

the force on the thing and the distance the force moves the thing

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27