Class/Course - Medical Entrance

Subject - Physics

Chapter - Ray Optics and Optical Instruments


Attention Medical Entrance standard Aspirants! Just Exam provide a platform to all students who want to make practice for various subject online. We prepare this platform on the base of CBSE. If you want to join our unlimited test series, then please write us at info@justexam.in about your class/course


Dear User, Kindly login/register to view answer & explanation of each question.
Click here to Login/Sign Up.
Q.1 A boy is trying to start a fire by focusing Sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. The diameter of the Sun is 1.39 x 109 m and its mean distance from the earth earth is 1.5 x 1011 m . What is the diameter of the Suns image on the paper?
  9.2 x 10-4 m
  6.5 x 10-4 m
  6.5 x 10-4 m
  12.4 x 10-4 m