class 12 ray optics

1:01:27

3:23:28

43:46

7:42:42

1:25:01

10:04:36

3:02:27

2:54:35

1:16:55

5:31:56

2:26:11

3:22:46

36:20

3:08:10

2:43:07

8:20:42

1:25:02

2:18:21

52:01

29:06

3:40:54

38:44

2:37:39

25:16

1:05:12

37:53

2:29:34

10:29:29

2:25:26

1:03:17

2:33:56

22:11

3:15:10

3:44:45

54:50

2:36:36

1:21:21

1:13:25

2:29:25

5:39:15

3:44:36

2:07:43

11:41

3:55:36

3:54:59

1:54:02

3:09:46

1:09:35

26:55

13:44

1:07:09

4:14:27

1:17:09

48:13

47:04

4:06:59

1:03:05

2:10:53

1:13:41

5:46:05