ray optics and optical instruments class 12 ncert

12:02

4:28

9:47

14:58

3:54

23:14

22:24

8:00

11:29

23:47

4:14

کوتاه

16:02

27:50

5:06

11:36

3:57

10:59

2:21

7:41

14:23

12:56

12:56

9:57

9:39

2:35

4:19

2:10

3:52

کوتاه

5:00

کوتاه

کوتاه

48:47

45:21

7:38

2:27

1:07

54:07

4:29