Learning Task 4: Read and answer the following questions. Use illustrations to further support your answers. Write your answers in a separate sheet of paper. 1. What are the different properties of light that apply to the image formation of optical devices such as mirrors and lenses?
2. The process of how images are formed in a camera is similar to that of our own eyes. What do you think is the difference between a camera and the human eye in terms of the process of image formation?
3. Why do you think the primary or objective lens of a refracting telescope should have a longer focal length?
4. What is the advantage of using a convex mirror as safety mirror placed on blind corners or area with limited visibility?
5. What are the advantages of using optical instruments in our daily activities? Share your own experiences.

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)

what are the options?

conclusions made on the basis of unstated or stated evidence are called inferences