Physics(Thank you)

1)Which of the following objects can set fire to a piece of paper in the presence of sunlight?

A)doulble concave lens
B)convex lens
C)convex mirror
D)concave lens

B, convex lens

2)What happens to a path of a light ray parallel to the principle axis, after it passes through a converging lens?

it passes through focus on the other side of the lens.

all of my answers are from what I understand and not guesses. I can refer to a page in my book to find where and how I arrived at the answer so if some are wrong please don't say I'm taking wild guesses because I'm not doing that

  1. 👍
  2. 👎
  3. 👁
  1. 1 and 2 are correct.

    1. 👍
    2. 👎
  2. It often appears so. You could do yourself a big favor by showing your thinking...that is where we can be used at an advantage, because the analyzing your thinking is what you really need. What if you got the above answers because your thinking was unclear?

    For instance, on the second, your thinking is shown. But if the first, you could have said, convex lens, because it focuses the parallel rays of the sun to a single point. But what if you had said, convex lens, because it always makes things hot. Well, we would have caught that thinking.
    Other times, on computational problems, such as one recently, you choose the wrong answer, when clearly another answer was correct. What are you expecting, us to work if for you? That usually does no long term good, it helps you much more for us to see your error and point it out. Our purpose here is to help students learn and understand errors in thinking that leads them astray.
    You would do yourself a great favor by briefly describing your thinking.

    1. 👍
    2. 👎
    👤
    bobpursley

Respond to this Question

First Name

Your Response

Similar Questions

  1. Science

    Two rocks of very different sizes are dropped from the same height. Which value will be different for the two rocks?(1 point) the acceleration of the rocks the velocity of the rocks after a few seconds the downward pull of gravity

  2. science

    A video shows the objects in the solar system orbiting the sun. Why do objects orbit the sun?(1 point) The sun is releasing heat and pushing objects away. The sun is so bright that objects are forced away. The sun is moving so

  3. science

    A student observes interactions between two sets of electrically charged objects. In each set, the objects carry either a charge of –1 or +1 Coulomb. Which question can the student ask to identify the set with the stronger

  4. Math

    Alexis has a rectangular piece of red paper that is 4cm wide.It’s length is twice it’s width she glues a rectangular piece of blue paper on on top of the red piece measuring 3cm by 7cm how many square cm will be visible on top

  1. Science

    The strength of the force of gravity between two objects is determined by which of the following factors? Select all that apply. A. the masses of the objects B. the distance between the objects C. the volumes of the objects D. the

  2. English

    Amelia is writing an informative text about how to make a paper airplane. She is writing to an audience of 10 to 14 year old children. Which hook would best grab her intended readers' attention? 1.Math class. The dinner table.

  3. Science

    A scientist adds iodine as an indicator to an unknown substance. What will this indicator reveal about the substance? a. the presence of glucose b. the presence of lipids or fat c. the presence of starch d. the presence of baking

  4. Language Arts Connexus

    Read the excerpt from Through The Looking Glass, by Lewis Carroll. In another moment Alice was through the glass, and had jumped lightly down into the Lookingglass room. The very first thing she did was to look whether there was a

  1. Math

    Each letter of alphabet is written on a separate piece of paper and placed in a box and then one piece is drawn at random. . What is the probability that the selected piece of paper has a vowel written on it?

  2. math

    From a fire tower, A, a fire is spotted on a bearing of N42°E. From a second tower, B, the fire is on a bearing of N12°W. The two fire towers are 23 km apart, and A is N63°W of B. How far is the fire from each tower? Just need

  3. Geometry

    1. Why are points and lines hard to define? A point you can't move at all, a line you can only move back and forth in the same direction. Does drawing a point or a line accurately illustrate its characteristics? 2. What do we mean

  4. Maths: Surds

    A rectangular piece of paper has an area of 100 rt2 cm^2. The piece of paper is such that, when it is folded in half along the dashed line, the new rectangle is similar (of the same shape) to the original rectangle. What are the

You can view more similar questions or ask a new question.