user-avatar
hobaolinh1103
2 năm trước
cho vật sáng ab hình dạng 1 mũi tên đặt trước thấu kính hội tụ có điểm tiêu cự là 12 cm ab vuông góc vs trục chính a nằm trên trục chính ab =h=2cm dựng ảnh ab' tạo bởi thấu kính trên và tính chiều cao của ảnh và khoảng cách từ ảnh tới thấu kính trong 2 trường hợp Ab cách thấu kính oa =d=96cm oa =d=8cm
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

II. Read the passage below and decide whether the statements are TRUE or FALSE? TORNADOES Did you ever see the movie The Wizard of Oz? A tornado sweeps up Dorothy and Toto, sending them to a new world where there are witches and talking lions! That entire story is fiction, but tornadoes are real and they are serious business. In fact, they can be the most dangerous storms of all. Tornadoes are sometimes referred to as twisters or cyclones. They are shaped like a cylinder. They are born in thunderclouds. The winds inside a tornado swirl around and around and can be more than 300 miles per hour (mph). The winds are so strong that tornadoes can lift animals, cars and even houses. The United States has more tornadoes than any other country in the world. State such as Texas, Oklahoma, Kansas, and Nebraska are hit hard by tornadoes. This part of the country is known as “Tornado Alley”. Tornado season is during the springtime and summer. If the conditions are right, a tornado can happen any time of year. 31. Tornadoes are sometimes referred to as twisters or cyclones. A. True B. False 32. They are formed in thunderclouds. A. True B. False 33. The winds inside a tornado can be more than 500 miles per hour (mph) A. True B. False 34. The winds are not strong enough for tornadoes to lift animals, cars and even horses. A. True B. False 35. Tornado season is during the springtime and summer. A. True B. False

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team