Experimental Physics

Step 1: Use the lens formula. For a thin lens,
Step 2: Substitute the given mean values. But since is taken negative for a real object (sign convention): (Using correct sign convention for real image and real object gives:)
Step 3: Calculate error in focal length. For Maximum fractional error:
Step 4: Find absolute error. Final Result: Matching closest option:

Step 1: Perform the addition inside the bracket:
Step 2: Both numbers have two decimal places, so the result is written as .
Step 3: The expression becomes:
Step 4: The number has three significant figures. Hence, the number of significant figures is

Step 1: Calculate the mean value.
Step 2: Find fractional errors. For a quantity ,
Step 3: Find absolute error. Final Answer: