The resolution of a microscope refers to its power to

Step 1: Analyze the question The question asks what "resolution" means for a microscope. Don't confuse it with magnification.

Step 2: Explain the concept

• Magnification is how many times larger the image appears compared with the real object (the "apparent size").
• Resolution (resolving power) is the ability of a microscope to show two objects or points that are very close together as separate and distinct, rather than blurred into one.

A microscope with high magnification but poor resolution gives a big, fuzzy image. A microscope with good resolution gives a sharp image with fine detail visible.

Step 3: Check each option

• A. Increase an object's apparent size: this is magnification, not resolution. ✗
• B. Distinguish clearly between two objects: this is the definition of resolving power. ✓
• C. Scan the surface of an object: this describes something like a scanning electron microscope's method, not resolution. ✗
• D. Focus on an object: this is done with the coarse and fine adjustment knobs. ✗

Step 4: Answer Resolution is the power of a microscope to distinguish clearly between two objects that are close together.

Exam tip: Remember "Magnification = Make bigger; Resolution = Reveals separate details." WASSCE often tests this pair, so keep the two definitions apart.