Question:
Which one of the following microscopic techniques provides a 3-dimensional perspective of live, unstained and transparent specimens obtained from the wild?
Which one of the following microscopic techniques provides a 3-dimensional perspective of live, unstained and transparent specimens obtained from the wild?
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{DIC microscopy} = “shadow effect” imaging of transparent cells, perfect for observing living, unstained samples in 3D-like contrast.
Updated On: Dec 5, 2025
- Confocal microscopy
- Fluorescence microscopy
- Phase contrast microscopy
- Differential interference contrast (Nomarski) microscopy
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The Correct Option is D
Solution and Explanation
Step 1: Recall the principle of DIC microscopy.
Differential interference contrast (DIC) microscopy, also known as Nomarski microscopy, enhances contrast in unstained, transparent samples by using polarized light and optical gradients.
Step 2: Compare with other microscopic methods.
- Phase contrast microscopy (C): Converts phase shifts into brightness differences but does not give 3D visualization.
- Confocal microscopy (A): Produces 3D images but usually requires staining and fluorescent dyes.
- Fluorescence microscopy (B): Also requires fluorophores and does not visualize unstained live specimens clearly.
Step 3: Conclusion.
Hence, DIC (Nomarski) microscopy provides a pseudo 3D appearance of live, transparent specimens without staining.
Differential interference contrast (DIC) microscopy, also known as Nomarski microscopy, enhances contrast in unstained, transparent samples by using polarized light and optical gradients.
Step 2: Compare with other microscopic methods.
- Phase contrast microscopy (C): Converts phase shifts into brightness differences but does not give 3D visualization.
- Confocal microscopy (A): Produces 3D images but usually requires staining and fluorescent dyes.
- Fluorescence microscopy (B): Also requires fluorophores and does not visualize unstained live specimens clearly.
Step 3: Conclusion.
Hence, DIC (Nomarski) microscopy provides a pseudo 3D appearance of live, transparent specimens without staining.
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