Question

pls solve it .....urgent only 5 question

Answer 1

(i)Here, 
n = 1.5 
v = 2 × 100000000 m/s 
Now, using 
⇒ n = c/v, we get 
⇒ 1.5 = c/ 2 × 100000000 
⇒ c = 1.5 × 2 × 100000000 
⇒ c = 300000000 m/s 
(ii) n = 1.3333.... 
c = 300000000 m/s 
Now, using 
⇒ n = c/v, we get 
⇒ 1.3333.... = 300000000/v 
⇒ v = 300000000/1.3333.... 
⇒ 2.26 × 100000000