Question

Where is total internal reflection by prism used in place of a plane mirror?

• A. Periscope
• B. Binoculars
• C. Slide proector
• D. All of the above

Answer 1

The correct option is D All of the above

Correct answer (d)

Periscope, Binoculars, Slide protector are used in place of a plane mirror total internal reflection by prism. Total internal reflection is a phenomenon which occurs when a propagating wave strikes. At the glass/air boundary of the flat surface, Prisms in binoculars use total internal reflection, rather than reflective coatings. If the water is calm, its surface appears mirror.These prisms can be used to deviate light through 90º or even 180º. They can also be used to provide erect images.