Đặt 1 vật AB hình mũi tên dài 2cm, vuông góc với trục chính của 1 thấu kính phân kì có tiêu cự 6cm, cho vật cách thấu kính 8cm a. Hãy dựng ảnh và nêu tính chất của ảnh b. Xác định vị trí và chiều cao của ảnh

Các câu hỏi liên quan

1. A film in which strange and frightening things happen is called a/an . A. thriller B. comedy C. drama D. animation 2. Not many people went to see the film; , it received good reviews from critics. A. however B. despite C. but D. although 3. he spent much money on the film, it wasn’t a big success. A. Even B. But C. Although D. Despite 4. Trung finds horror films really . A. disgust B. disgusts C. disgusting D. disgusted 5. they spent a lot of money on the film, it wasn’t a big success. A. However B. Nevertheless C. When D. Although 6. We didn’t find it funny it was a comedy. A. in spite of B. despite C. although D. but 7. In Titanic, it Leonardo DiCaprio as Jack Dawson, a poor artist. A. directs B. shows C. acts D. stars 8. The end of the film was so that many people cried. A. shocking B. moving C. exciting D. boring 9. I went to the cinema with my friends yesterday feeling very tired. A. although B. in spite of C. but D. so 10. beginning with a terrible disaster, the film has a happy ending. A. In spite B. Despite C. Although D. However 11. I found the book so that I couldn’t put it down. A. gripping B. boring C. tiring D. shocking 12. careful preparation, we have a lot of difficulties in making a new film. A. With B. However C. Such D. Despite 13.The film has a silly plot. , many people enjoyed it. A. Though B. Moreover C. Because D. Nevertheless 14.A is a film that shows real life events or stories. A. Action B. documentary C. thriller D. comedy 15.I have never felt as as I did when I watched that horror film. A. terrify B. terrified C. terrifying D. terrible