The radius of the first zone in a zone plate of focal length 25cm for a light of wavelength 5000 Å is ____

Explore topic-wise MCQs in Engineering Physics Questions and Answers.

This section includes 1 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.	The radius of the first zone in a zone plate of focal length 25cm for a light of wavelength 5000 Å is ____
A.	0.01 cm
B.	0.02 cm
C.	0.03 cm
D.	0.04 cm
Answer» D. 0.04 cm

Discussion