In: Physics
1. If a concave mirror has a focal length of 20 cm, at which object distance will an image larger than objects be formed on screen?
a.) 40 cm b.) 30 cm c.) none of the choices d.) 14 cm e.) 50 cm
2. An electron and proton are projected with the same velocity when a uniform magnetic field perpendicular to the velocity of the two charges is applied. The electron follows a circular path of radius 1 mm. What is the radius of the proton's path?