Question
An object is placed at a distance of 10 cm in front of a
double convex lens made of glass of refractive index 1.5. Both the radii of curvature of the lens are 30 cm in magnitude. What is the position of the image formed?Solution
Given, Distance of the object from the lens = u = -10 cm Refractive index of the lens = µ = 1.5 Radii of curvature of the lens are 30 cm in magnitude R1 = 30 cm and R2 = -30 cm (As per sign convention) According to Len's Maker's formula 1/f = (µ - 1)(1/R1 - 1/R2) = (1.5 - 1)(1/30 - (-1/30) = 0.5 x 2/30 = 1/30 or, f = 30 cm From lens equation, 1/v - 1/u = 1/f v = fu/(u + f) = (30 x -10)/(-10 + 30) = -300/20 = -15 cm The image is formed 15 cm on the same side as the object
Which of the following is a type of phishing attack?
Which SQL statement is used to remove all rows from a table without logging individual row deletions?
Which type of relationship exists when a record in one table can relate to multiple records in another table, and vice versa?
Which of the following is a property of a relational database?
Which SQL command is used to retrieve data from a database?
Which of these ensures referential integrity?
Which normal form ensures that every determinant is a candidate key?
What is a table joined with itself called?
Which SQL isolation level allows phantom reads but prevents dirty reads and non-repeatable reads?
Which of the following best describes the control flow when a method in a subclass overrides a method in its superclass, and an object of the subclass i...
Relevant for Exams:
