(E) Answer the following questions.
1) Define the term: Opaque objects
2) Define temperature? What is its SI unit?
3) What are the difference between a shadow and an image?
4) Convert 500 meter into cm.
Answers
Answer:
1. Opaque objects block light from traveling through them. Most of the light is either reflected by the object or absorbed and converted to thermal energy. Materials such as wood, stone, and metals are opaque to visible light.
2. Temperature is the measure of hotness or coldness expressed in terms of any of several scales, including Fahrenheit and Celsius. Temperature indicates the direction in which heat energy will spontaneously flow—i.e., from a hotter body (one at a higher temperature) to a colder body (one at a lower temperature).The kelvin is the SI unit of temperature
3.Shadow Image
a Shadow is formed by obstruction of light
a Image is a true reflection of an object
b. Shadow is a region of the absence of light
b. Image is formed by light rays.
4 500×100 = 50000cm