NCERT Solution for Class 12 Physics Chapter 11 : Dual Nature Of Radiation And Matter CBSE NCERT Solution for Class 12 Physics Chapter 11 : Dual Nature Of Radiation And Matter – All Questions Answered. Question 11.1: Find the (a) maximum frequency, and (b) minimum wavelength of X-rays produced by 30 kV electrons. Add a Comment Cancel reply Your email address will not be published. Required fields are marked *Comment:*Name:* Email Address:* Website: Notify me of follow-up comments by email. Notify me of new posts by email. This site uses Akismet to reduce spam. Learn how your comment data is processed.