Question:medium
What is the correct arrangement of lenses from the eye to the source of light in a light microscope?
What is the correct arrangement of lenses from the eye to the source of light in a light microscope?
Show Hint
Trace lenses starting at the eyepiece and ending at the lamp under the stage.
Updated On: Jun 24, 2026
- Ocular lens : Objective lens : Condenser lens
- Objective lens : Ocular lens : Condenser lens
- Condenser lens : Objective lens : Ocular lens
- Objective lens : Condenser lens : Ocular lens
Show Solution
The Correct Option is A
Solution and Explanation
Step 1: Picture the microscope vertically. The eyepiece is at the very top where the eye looks in, the objectives are mounted on the revolving nosepiece just above the specimen, and the condenser is fixed under the stage to gather light from the lamp.
Step 2: Tracing from the top (eye) downward to the lamp gives: ocular (eyepiece) first, then the objective, then the condenser sitting closest to the illumination source.
Step 3: The remaining choices either start with the objective or put the condenser in the middle, which does not match the real construction of the instrument.
So the order from eye to light source is ocular, objective, condenser.\[\boxed{\text{Ocular : Objective : Condenser}}\]
Step 2: Tracing from the top (eye) downward to the lamp gives: ocular (eyepiece) first, then the objective, then the condenser sitting closest to the illumination source.
Step 3: The remaining choices either start with the objective or put the condenser in the middle, which does not match the real construction of the instrument.
So the order from eye to light source is ocular, objective, condenser.\[\boxed{\text{Ocular : Objective : Condenser}}\]
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