Question

A polarizing filter works best at :

• A. \(45^\circ\) to sun
• B. \(180^\circ\) to sun
• C. \(270^\circ\) to sun
• D. \(90^\circ\) to sun

Hint:

For maximum polarization effect in photography, keep the camera approximately \(90^\circ\) to the direction of sunlight.

Answer 1

The Correct Option is D

Concept: A polarizing filter is a photographic filter used to reduce reflections, glare, and haze while improving colour saturation and contrast in photographs. It is especially useful in landscape photography because it enhances blue skies, water surfaces, and cloud details. A polarizing filter works most effectively when the camera is positioned at an angle of: \[ 90^\circ \] to the direction of sunlight. At this angle, polarized light is strongest, allowing the filter to block reflected light efficiently.

Step 1: Understanding the function of a polarizing filter. A polarizing filter helps:
• Reduce unwanted reflections
• Increase colour saturation
• Improve contrast
• Darken blue skies
• Remove glare from water and glass The filter selectively blocks polarized light waves.

Step 2: Understanding polarization of sunlight. Sunlight becomes partially polarized after scattering in the atmosphere. The maximum polarization effect occurs when: \[ \text{Camera direction} \perp \text{Sunlight direction} \] That means the angle between the camera and the sun should be: \[ 90^\circ \]

Step 3: Analyzing Option (A) \(45^\circ\) to sun. At \(45^\circ\), the polarization effect exists but is not maximum. Therefore, the filter will not work at its best efficiency. Hence, Option (A) is incorrect.

Step 4: Analyzing Option (B) \(180^\circ\) to sun. At \(180^\circ\), the camera directly faces away from the sun. The polarization effect becomes weak. Hence, Option (B) is incorrect.

Step 5: Analyzing Option (C) \(270^\circ\) to sun. This angle does not represent the maximum polarization condition used in photography. Hence, Option (C) is incorrect.

Step 6: Analyzing Option (D) \(90^\circ\) to sun. At \(90^\circ\), the polarized light effect becomes strongest. This provides:
• Maximum glare reduction
• Better sky enhancement
• Improved image contrast Therefore, this option is correct. Final Conclusion: A polarizing filter works best at: \[ \boxed{90^\circ \text{ to the sun}} \] Therefore, the correct option is: \[ \boxed{(4)} \]