Question

PHOTOELECTRIC EFFECT LAB Enter your answers to Canvas. Objectives: The main objective of this lab is to observe the photoelectric effect experiment qualitatively. From the observations, you will summarize the important relationship between the properties of the photoelectrons (average speed, kinetic energy) to the properties of the incident light (wavelength, frequency). You will also summarize the impact of changing the intensity of the incident light. Resources Go to the Physics Education Technology Web site (http://phet.colorado.edu/simulations/). Choose "Physics", then "Quantum Phenomena", Choose the "Photoelectric Effect" simulation. Basics Basically, the photoelectric effect works as follows. When light strikes a surface, such as that of a metal, the energy in the light beam may be imparted to some electrons, which, with this additional energy, may now escape through the surface and be externally detected as current. We are interested in the kinetic energy, KE, of these "photoelectrons”.
i need help with activity 2. i thought a would be the speed increases as the battary increases. but for b and c i am very confused.

Answer 1

The + Question b positive terminal of the battery is on the eight. i) Direction of electric field lines is to the left. 트 i Electric forrce FE = 4€ is againts the electric field lines. + Els = -lE

,, The to the sight ti) Direction of the electric forree is to the right. photoelectron moning speed us. As fonce is to the sight questione If polarity photoeleetams moving to the light slow down. As then force will act to the left. of the battery reversed then 3 -