问题 应用设计题

按照题目要求作图:

(1)如图甲所示,一束光AO从空气中入射到水面上,请画出反射光线,并用字母β表示反射角.

(2)在图乙中,画出光线经凸透镜折射后的光路图.

(3)一束光线经过某透镜前后的情况如图丙所示,请在图中虚线框内画出这个透镜.

(4)在图丁中,应用平面镜成像的特点画出物体AB在平面镜中成的像A'B'.

答案

答案如图所示

题目分析:根据光的反射定律作反射光线,要先画法线,再根据反射角等于入射角作出反射光线;在画凸透镜的三特殊光线时,从凸透镜焦点发出的光经凸透镜折射后平行于主光轴;凸透镜对光起会聚作用,凹透镜对光起发散作用,由图中的光线可以看出,此透镜对光起发散作用,所以应是凹透镜;平面镜成的是正立等大的虚像,像与物关于镜面对称。

单项选择题
阅读理解

阅读理解

     According to the Daily Telegraph on February 10, a British woman who was "pushed to the edge" by

a faulty fire alarm that sounded non-stop for several days discovered that the sound was in fact made by

a parrot in her garden.

     Shanna Sexton, 25, from Devon, UK, even called in workmen to try and solve the problem. But she

was amazed to see an African Grey Congo parrot stopped on a water bucket as she came out washing in

the garden.

     The noisy parrot, called Sammi, had escaped from neighbor Louise Ledger's house a week earlier and spent seven days in the garden imitating a smoke alarm.

     Ledger, 38, was worried and spent hours searching for her beloved pet and she even pasted the

neighborhood with missing posters hoping for Sammi's return.

     "I am over the moon. I am going to give Shanna a huge bunch of flowers. When I found out where he

was I could not have got there any faster. He is always making funny noises from anywhere and

everywhere. I think he must have heard me burning the toast once so he made the smoke alarm noise,"

said Ledger.

1. According to the first paragraph, what exactly pushed the British woman Shanna Sexton to the edge?

A. A parrot              

B. A parrot's noises

C. A fire alarm             

D. The sound made by a parrot

2. What does the underlined word "faulty" in Para. 1 mean?

A. Right 

B. Wrong

C. Worried

D. Relaxed

3. What does the underlined sentence in the last paragraph mean?

A. I am so angry     

B. I am so worried

C. I am so excited          

D. I am so disappointed

4. Which of the following is NOT true according to the passage?

A. Shanna Sexton was amazed to see a parrot in her garden

B. Ledger loved her parrot very much and worried for his missing

C. The parrot has been missing for a week

D. The parrot imitated the fire alarm at Shanna's house