Which of the following statements is FALSE 1. Focal length of a convex lens is positive. 2. Focal length of a concave lens is negative. 3. All measurements to the right of the optic centre are positive. 4. All measurements to the left of the optic centre are positive. ?

Statement 2 only
Statement 3 only
Statement 4 only
Statement 1 only

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 3 : Statement 4 only

Option 3 is correct, i.e. All measurements to the left of the optic centre are positive.

Focal length of a convex lens is positive.
Focal length of a concave lens is negative.
All measurements to the right of the optic centre are positive.
All measurements to the left of the optic centre are negative.

4 views Answered 2022-09-04 04:29

Related Questions

A convex lens has a focal length of 10cm. At which of the following positions should an object be placed so that this convex lens may act as a magnifying glass?

1 Answers 4 Views

Which of the following statements about optical microscope is/are correct 1. Both the eyepiece and objective of a microscope are convex lenses. 2. The magnification of a microscope increases with increase in focal length of the objective. 3.The magnification of a microscope depends upon the length of the microscope tube. 4. The eyepiece of a microscope is a concave lens. Select the correct answer using the code given below:?

1 Answers 4 Views

Read the information given below and answer the questions that follow by choosing the most appropriate option. Eight friends, Aditya, Barkha, Candy, Dharam, Ekta, Fehmida, Geeta and Heena, are sitting around a circular table, all facing away from the centre of the table. All positions are at equal distance from each other. Dharam is third to the left of Fehmida. Ekta and Geeta always sits immediately next to each other. Heena is third to the right of Geeta. Aditya sits to the immediate left of Candy. Fehmida is second to the right of Barkha. Candy sits immediately next to neither Fehmida nor Dharam. In which of the following pairs is the first person sitting to the immediate left of the second person?

1 Answers 4 Views

A convex lens is used to cure an eye defect. Choose the name of the eye defect for which the convex lens is used.?

1 Answers 4 Views

Eight children, A, G, K, M, N, R, S and T are sitting around a circular table facing the centre and at equal distance from each other (not necessarily in the same order). R is sitting to the immediate right of G and third to the left of T. S is sitting to the immediate left of T and fourth to the right of A. N is sitting to the immediate right of R and third to the left of K. Which of the following pair is sitting opposite to each other?

1 Answers 4 Views

Consider the following statements 1. The focal length of the eyepiece is larger than the focal length of the objective. 2. The focal length of the eyepiece is smaller than the focal length of the objective. 3. The aperture of the eyepiece lens is larger than the objective lens. Which of the following statements is/are INCORRECT about a compound microscope?

1 Answers 4 Views

Three Statements are given followed by four conclusions numbered I, II, III and IV. Assuming the statements to be true, even if they seem to be at variance with commonly know facts, decide which of the conclusions logically follow (s) from the statements. Statements: I. All streets are lights. II. Some rights are lights. III. No right is left. Conclusions: I. Some rights are streets. II. No light is left. III. Some lights are street. IV. Some streets are left.?

1 Answers 4 Views

Consider the following statements about folds: An anticline is a fold that is convex upward, and a syncline is a fold that is concave upward. An anticlinorium is a large syncline on which minor folds are superimposed, and a synclinorium is a large anticline on which minor folds are superimposed. Which of the above statements is correct?

1 Answers 4 Views

If the focal length of a convex lens is 50 cm, which one of the following is its power?

1 Answers 4 Views

While looking at an image formed by a convex lens (one half of the lens is covered with a black paper), which one of the following will happen to the image?

1 Answers 4 Views

এক্সাম দিয়ে মেধা যাচাই করুন

Job Preparation (1125)

Admission (754)

এসএসসি (10)

এইচএসসি (5)