Question

Light pathway of a typical microscope consists of several items, viz.,
A. Light source to Mirror
B. Field Diaphragm to Condenser
C. Stage to Specimen
D. Objective to Body
E. Ocular to Eye/Camera
Choose the correct answer from the options given below

• A. Light path is A to C to B to D to E
• B. Light path is A to D to C to B to E
• C. Light path is A to B to C to D to E
• D. Light path is A to E to C to B to D

Hint:

Mnemonic: Source $\rightarrow$ Condenser $\rightarrow$ Specimen $\rightarrow$ Objective $\rightarrow$ Ocular.
Light flows from the source at the bottom to the eye at the top.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
The question asks for the logical, sequential path that photons take from the source to the observer's eye in a standard compound light microscope.

Step 2: Detailed Explanation:
The light travels from the bottom of the microscope upwards through several optical components:

• A (Source to Mirror): The journey begins at the illuminator or light source. In older models, a mirror is used to reflect external light into the system.

• B (Diaphragm to Condenser): The light then passes through the field diaphragm (which controls the diameter of the light beam) and into the condenser, which focuses the light into a tight cone.

• C (Stage to Specimen): The focused light passes through the hole in the stage and hits the specimen mounted on a slide.

• D (Objective to Body): After passing through the specimen, the light enters the objective lens (creating a primary magnified image) and travels up the body tube.

• E (Ocular to Eye): Finally, the light enters the ocular lens (eyepiece), which magnifies the primary image further before it reaches the eye or a camera sensor.
Final Answer:
The chronological light path is A $\rightarrow$ B $\rightarrow$ C $\rightarrow$ D $\rightarrow$ E.