中考物理复习限时训练2

中考物理复习限时训练2
中考物理复习限时训练2

限时训练2光现象

1.(2019·石家庄新华检测)关于光现象,下列说法不正确的是( A )

A.在河边看到水中的鱼是光的反射形成的

B.影子是由于光的直线传播形成的

C.雨后的天空,可以看到彩虹,是光的折射形成的

D .紫外线可以用来消毒、灭菌

2.(2019·河北模拟)光给人类带来了光明,下列关于光现象的描述中,错误的是( B )

A.“潭清疑水浅”是由于光的折射产生的一种现象

B.三月桃花盛开,游人能观赏到美丽的桃花,是光在桃花表面发生镜面反射的结果

C.雨过天晴后,天空中出现彩虹是光的色散现象

D.人们常说的“天狗吃月”这一现象是由于光的直线传播形成的

3.如图所示,下列叙述与图中情景相符的是(B)

A.把铅笔斜插入盛水的玻璃杯里,看上去铅笔好像在水面处折断了,这是光的反射现象

B.士兵们站在地面上,他们的影子是光沿直线传播形成的

C.平静的水面上倒映着岸边的景物,这是光的折射形成的

D.通过放大镜看邮票的细微之处,看到的是放大的实像

4.(2019·福建中考)如图所示的四种现象中,由于光的折射形成的是(D)

A.水中荷花的倒影

B.屏幕上的手影

C.观后镜中汽车的像

D.放大镜下树叶的像

5.(2019·保定一模)某水库水深20 m,平静的水面上空,一只鸟正以5 m/s的速度冲向水中捕食小鱼,向下俯冲的过程中平静水面中的像相对于它的速度是__10__

m/s,像的大小__不变__(选填“变大”“不变”或“变小”);鸟看见的鱼比实际位置__偏高__(选填“偏高”“偏低”或“不变”)。

6.(2019·保定二模)2019年,我国可以观测到2次日食,1月6日的日食已经过去了,12月26日还有一次日食奇观,日食是由于光__沿直线传播__形成的。地球到太阳的距离约 1.5×108km,阳光从太阳到地球需要__500__s。光从太空中斜射入大气层

时会发生折射,折射角__小于__(选填“大于”“等于”或“小于”) 入射角。(光速c

=3×108 m/s)

7.(2019·邯郸二模)在平静的湖面上空一只鸟正冲向水面,它在湖水中的像是__

虚__(选填“实”或“虚”)像,在俯冲的过程中,鸟的像__大小不变__(选填“逐渐变大”“逐渐变小”或“大小不变”)。小明

看到湖面“很亮”,原因是阳光照到湖面上发生了_镜面反射__。

8.如图所示,小明将一枚硬币放在碗底,眼睛在A处恰好看不到它。沿碗壁缓缓向碗中加水,小明在A处又能看到“硬币”。这是因为光从__水__斜射入__空气__中时发生了__折射__现象。

9.(2019·河北模拟)如图是装有水的圆柱形玻璃杯,将铅笔靠近玻璃杯的后面,透过玻璃杯可以看到笔尖指向左侧,此时成像为正立、__放大__的虚像。如果将铅笔由靠近玻璃杯的位置向远处慢慢移动,你会看到笔尖指向__右__侧。

中考复习

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