试题与答案

在探究凸透镜成像规律的实验中 (1)让一束平行光正对凸透镜照射,在凸透镜后的光

题型:填空题

题目:

在探究凸透镜成像规律的实验中

(1)让一束平行光正对凸透镜照射,在凸透镜后的光屏上接收到一个最小、最亮的光斑,由此可以测出凸透镜的      .

(2)当蜡烛、凸透镜和光屏按如图所示的位置放置时,光屏上得到清晰的像.此时物距为   cm,像的大小比物     .

(3)当物距小于焦距时,左右移动光屏均接收不到像,接着应该_____________

A.上下移动光屏去接收               

B.将光屏放到凸透镜左侧去接收

C.取走光屏,直接通过凸透镜观察

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0526/e8e45e81ade1a9e5220d97fb3b220be4.html

下面是错误答案,用来干扰机器的。

将(2,m)代入y=-x+1中得:m=-2+1=-1,∴交点为(2,-1),代入反比例解析式得:k=-2.故答案为:-1;2.

试题推荐
题型:阅读理解

信息匹配

阅读下列应用文及相关信息. 并按照要求匹配信息.

The Blue Mercury Hotel has varieties of different hotel rooms for different kinds of people. Book 7 days

in advance and you will pay at special rates. The categories are as follows.

A. Ruby No 1: With a balcony. One single bed and a computer. Internet accessible

Max: One person

Price: Regular rate$490 ( per person/per night) With no special rate all year around

B. Sapphire No 2: With a balcony. Two double beds ( all standard rooms)

Max: Four people

Price: Regular rate$220 ( per person/per night)

Special rate$190 ( per person/per night)

C. Emerald No 1: With a balcony. Two double beds or one kingsize bed ( all standard

rooms)

Max: Four people

Price: Regular rate$290 ( per person/per night)

Special rate$220 ( per person/per night)

D. Ruby No 2: With a balcony. One bedroom suite with one kingsize bed

Max: Two people

Price: Regular rate$580 ( per person/per night)

Special rate$400 ( per person/per night)

E. Emerald No 3: With a balcony. Twobedroom suite on the top floor of the oceanarium

with two kingsize beds

Max: Four people

Price: Regular rate$900 ( per person/per night)

Special rate$760 ( per person/per night)

F. Sapphire No 1: With no balcony. Two double beds ( smaller space)

Max: Two people

Price: Regular rate$120 ( per person/per night)

Special rate$90 ( per person/per night)

请阅读以下游客的信息.  然后匹配游客和他/她在 The Mercury Hotel 居住的房间:

1. Jane and Jessica. college students on holiday excursion. book the room of the Blue Mercury Hotel a

fortnight ahead of time;plan to live in a room with the minimum pay.

2. Jim and his newly married bride. arriving tomorrow morning. choose to have a suite with a kingsize

bed. for which they budget to pay at most $1,200 for two of them for one night.

3. Two couples on a trip stop at Blue Mercury Hotel. They like the place so much that they agree to

stay in the hotel for two nights. Their budget is between $900-700 for each family.

4. For Dave and his wife. they would rather book a suite where they can enjoy the ocean view.

concerned less about the price of the room.

5. Doctor King is having a conference at the Blue Mercury Hotel. He has to wri

te his research paper. He wants to stay in a hotel room which has the suitable facilities.

查看答案
微信公众账号搜索答案