PLEASE HELP ME WITH THIS ONE QUESTION A converging lens has a focal length of 40 cm. If an object is placed 50 cm in front of the image, where will the image be formed?

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.