Q19DQ - University Physics with Modern Physics

Question

Ordinary photographic film reverses black and white, in the sense that the most brightly illuminated areas become blackest upon development (hence the term negative). Suppose a hologram negative is viewed directly, without making a positive transparency. How will the resulting images differ from those obtained with the positive? Explain.

Step-by-Step Solution

Answer

The negative of a hologram is pseudoscopic.

Step 1: Given Data

A hologram is a record of interference patterns on the photographic film, made using the light from a coherent light source and which is scattered from the object.

To make a hologram two things are required: a cohered light source, and extreme mechanical stability.

Step 2: Negative hologram

The negative image produced by holography reverses the depth perception. This means that what is close seems far and what is far away appears close to the viewer. Thus, we say, negatives are pseudoscopic.