Concept explainers
To explain: The reason why the moon’s shadow has a dark center surrounded by a region of increasing brightness.
Answer to Problem 1CQ
The reason why the moon shadow has a dark center surrounded by a region of increasing brightness is been explained.
Explanation of Solution
During the solar eclipse, the moon comes in between the sun and the Earth. The rays coming from the sun will strike the moon’s surface and form a region of dark circle in the Earth’s surface called umbra as shown in Figure 1.
Some part of the rays strikes the moon and reaches the Earth’s surface causing dark spots (umbra). The other rays coming from the sun will not be blocked by the moon and form bright spots (penumbra) on the Earth’s surface.
Conclusion:
Thus, the reason why the moon shadow has a dark center surrounded by a region of increasing brightness is been explained.
Want to see more full solutions like this?
Chapter 18 Solutions
College Physics: A Strategic Approach (4th Edition)
- A 4.00-m-long pole stands vertically in a freshwater lake having a depth of 2.00 m. The Sun is 40.0 above the horizontal. Determine the length of the poles shadow on the bottom of the lake.arrow_forwardWhat happens to a light wave when it travels from air into glass? (a) Its speed remains the same. (b) Its speed increases. (c) Its wavelength increases. (d) Its wavelength remains the same. (e) Its frequency remains the same.arrow_forwardThe sun is 60 degrees above the horizon. Rays from the sun strike the still surface of a pond and cast a shadown of a stick that is stuck in the sandy bottom of the pond. If the stick is 10cm tall, how long is the shadow? Please be detailed. Thanks!arrow_forward
- Can a fire have shadow? Explain your answer.arrow_forwardA student wants to estimate the height of a tree from ground level. He measures the length of its shadow as 10 m and the angle from the top of the shadow on the ground to the top of the tree is 60°. What is the height of the tree based on these measurements?arrow_forwardChapter 25: Problem 5: In the year 1178, five monks at Canterbury Cathedral in England observed what appeared to be an asteroid colliding with the moon, causing a red glow in and around it. It is hypothesized that this event created the crater Giordano Bruno, which is right on the edge of the area we can usually see from Earth. a) How long after the asteroid hit the Moon, which is 3.84 ×10⁵ km away, would the light first arrive on Earth in seconds?arrow_forward
- An electric post, which leans 10°15’ from the vertical towards the sun, cast a shadow 9.43m long on the ground when the angle of elevation of the sun is 54°50’. Find the length of the post above the ground. Show solution. Thanksarrow_forward____9. There are seven members of electromagnetic radiation family.____10. EM waves are composed of oscillating magnetic and electric fields.____11. When light moves from one medium to another, it normally diffract.____12. The angle of incidence θi is equal to the angle of reflection θr according to Snell’s Law.arrow_forwardAs a result of his observations, Ole Roemer concluded that eclipses of Io by Jupiter were delayed by 21 min and 22 second, during a six-month period as the Earth moved from the point in its orbit where it is closest to Jupiter to the diametrically opposite point where it is farthest from Jupiter. Using the value 1.50×108 km as the average radius of the Earth’s orbit around the Sun, calculate the speed of light from these data. (Give your answer in scientific notation using "m/s" (meter per second) as unit).arrow_forward
- Can air make shadows? Explain it.arrow_forwardDuring a lunar eclipse, the Moon is not completely dark but is usually a deep red in color. Explain this in terms of the refraction of all the sunsets and sunrises around the world.arrow_forward13. (4 marks) While performing a series of tests on an unknown substance, a lab determines that it has an index of refraction of 2.35. What is the speed of light inside this substance?arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax CollegeCollege PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningAn Introduction to Physical SciencePhysicsISBN:9781305079137Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar TorresPublisher:Cengage Learning