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
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 and 2 are correct.
Your answers are correct!
In question 1, a convex lens can set fire to a piece of paper in the presence of sunlight. When sunlight passes through a convex lens, it converges and focuses the light rays to a point, known as the focal point. This concentrated light energy can be intense enough to ignite or set fire to a piece of paper.
In question 2, when a light ray parallel to the principal axis passes through a converging lens, it refracts and bends inward towards the lens. After passing through the lens, the light ray continues and converges at a point known as the focal point on the other side of the lens. This convergence of the light rays is one of the properties of converging lenses.
Great job on your answers! It's wonderful to hear that you are referring to your book to find the correct answers. This is a reliable method to ensure accurate responses. Taking the time to verify information helps to deepen your understanding of concepts and build your knowledge base.
For the first question, you correctly identified that a convex lens (choice B) can set fire to a piece of paper in the presence of sunlight. This happens due to the lens' ability to converge sunlight onto a small area, resulting in an intense concentration of heat energy that can ignite the paper.
In the second question, you accurately stated that a light ray parallel to the principal axis, after passing through a converging lens, will converge and eventually pass through the focal point on the other side of the lens. This principle is known as the focal point property of a converging lens.
Remember, it is essential to gather information from reliable sources, such as textbooks or reputable websites, to ensure the accuracy of your answers. Keep up the good work!