Peoples Physics Book Version-3

17.1. The Big Idea http://www.ck12.org

Answers to Selected Problems

1..
2..
3. 2200 blue wavelengths
4. 65000x−rays
5. 6× 1014 Hz6. 3 .3 m
6..
7..
8. b. vacuum air c. 1. 96 × 108 m/s
9. 6. 99 × 10 −^7 m; 5. 26 × 10 −7 m
10..
11..
12. Absorbs red and green.
13. 25◦
14..
15. 33. 3 ◦

1. 
   
   
   
   49. 7 ◦
   
   
   
   


2. No such angle


3. 
   
   
   
   48. 8 ◦
   
   
   
   


4. b. 11.4 m c. 11.5 m


5. 85 cm


6. c.+4 units e.− 1


7. 6 units


8. bigger;M= 3


9. c. 1.5 units d. 2/ 3


10. c. 3 units e.− 2 / 3


11. c. 5.3 units
    22..


12. b. 22.5 mm
    24..


13. 32 cm


14. 
    
    
    
    10. 2 ◦
    
    
    
    


15. 27 cm


16. 20 cm


17. 0.72 m
    26..


18. 54 cm,44 cm,21 cm, 8 .8 cm
    28..


19. 
    
    
    
    13. 5 ◦
    
    
    
    


20. 549 nm