What are polaroids ? Mention some of their practical uses ?
What are polaroids? Give their applications.
Which of the follwing is NOT the use of polaroid ?
A beam of natural light falls on a system of 6 polaroids, which are arranged in succession such that each polaroid is turned through 30^@ with respect to the preceding one. The percentage of incident intensity that passes through the system will be
A beam of ordinary light is incident on a system of four polaroids which are arranged in succession such that each polaroid is turned through 30^(@) with respect to the preceding one. The percentage of the incident intensity that emerges out from the system is appromately
