3 Replies
@Gyro Gearloose
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.angular width=lambda/d; so it is proportional to lambda. In medium of refractive index n, effective lambda becomes 1/n times and hence the angular width becomes 1/n times.