Hi,
the program is as follows
___________________________________________________________
import java.io.*;
class doubleval
{
public static void main()throws IOException
{
DataInputStream dt=new DataInputStream(System.in);
System.out.println("Enter NUMBER WHOSE DOUBLE U WANT TO PRINT");
int n=Integer.parseInt(dt.readLine());
for(int i=n;i<=100;i=2*i)
{
System.out.println(i);
}
}
}
Answer:
A. f/2.8
Explanation:
A hole within a lens, through which light travels into the camera body is referred to as the APERTURE.
It is typically expressed as "f number" in photography. Basically, a fast lens is any lens with a maximum aperture of f/4 or more i.e f/2.8 , f/1.8 , f/1.4 etc.
The smaller the number is the bigger the maximum aperture is. Hence, the bigger the maximum aperture the more light that your lens will allow in.
Therefore, the ideal aperture settings for a fast lens is f/2.8
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