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Which of the following is NOT correct about image formation by a convex lens? I. Object at infinity, image real and erect II. Object at F1, image real and erect III. Object at 2F1, image virtual and erect

Which of the following is NOT correct about image formation by a convex lens? I. Object at infinity, image real and erect II. Object at F1, image real and erect III. Object at 2F1, image virtual and erect Correct Answer I, II, and III

Related Questions

Given below are four statements- (p) The second principal focus of a lens is the position of the object, real or virtual whose image is at infinity. (q) The second principal focus of a lens is the position of the image, real or virtual whose object is at infinity. (r) The first principal focus of a lens is the position of the object, real or virtual whose image is at infinity. (s) The first principal focus of a lens is the position of the image, real or virtual whose object is at infinity.  Examine the above statements and find which among then are correct. 
Consider the following statement 1. When the object is placed at infinity of the convex mirror, then the image is formed at the focus. 2. The image formed by a convex mirror is always real, inverted, and smaller in size. 3. When the object is placed at infinity and pole of the convex mirror, then the image is formed at the focus. Which of the following statements is CORRECT?
 Which of the following statements is/are true of the human eye lens? Choose the correct answer from the code given below:  (i) It is a convex lens (ii) It is a concave lens (iii) It is a convex lens of variable focal length (iv) It forms a real and inverted image of a distant object at the retina
Consider the following statement: A ray of light passing through the optical centre of a convex lens emerges without any deviation after refraction. A ray of light passing through the first principal focus of a convex lens  emerges parallel to the principal axis after refraction. A ray of light passing through the optical centre of a convex lens emerges parallel to the principal axis after refraction. Which one of the following statements INCORRECT?
What will be the position and nature of the image when an object is placed at 2F1 of the convex lens?
In a convex mirror, when the object is at infinity then which of the following is correct? I. Nature of image is virtual and erect II. Size of the image is point sized
Match the following (a) Concave mirror (i) A diverging lens (b) Concave lens (ii) Magnifying glass (c) Convex mirror (iii) Dentist mirror (d) Convex lens (iv) Rear view mirror
The uniform distribution can range from -infinity to 0 or 0 to Infinity but not from -infinity to infinity.
When an object is on the . . . . . . . . of a convex lens, the image is amplified, virtual, and erect.
To obtain a virtual enlarged erect image on the same side of a convex lens after refraction, where should the object be placed?