Knowing Which Equation to Use

[AChoudhry_1L]

When approaching quantum problems, what is your method to determine which equation we should be using?

[FDeCastro_1B]

I use Dr. Lavelle's problem solving guidelines:
1. What is the question?
2. What concepts do I know?
3. What model or equations do I know?
4. What is known? What is unknown?
5. Can I express unknown with respect to the known?

[AKhanna_3H]

I usually start by figuring out what variables I know and then finding an equation that has the unknown variable in it, filling in all the known variables that apply to that equation.

[Natalie Wang 1B]

At the moment, I'm distinguishing them based off of electromagnetic radiation and the quantum mechanics of electrons. For example, De Brogile's equation can only be applied to electrons, NOT light.

[gabbymaraziti]

I usually begin by circling the quantities and units given in the problem, and what type of unit I need to find. Then, I just find which equation allows me work between what is given and the unknown.