When a Person with a near Point at 28 Cm

question 80

Multiple Choice

When a person with a near point at 28 cm uses a certain magnifying glass,it produces an angular magnification of 7.0 with the image very distant.What is the focal length of the lens of this magnifying glass?

• A)2.0 cm
• B)3.0 cm
• C)4.0 cm
• D)5.0 cm
• E)6.0 cm

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Definitions:

Time-Series Designs

Research designs that involve repeated measurements of dependent variables over time, both before and after a treatment or intervention, to assess change.

Selection Effects

Biases introduced into research when the participants or subjects are not randomly assigned, potentially leading to unrepresentative samples and skewed results.

Observations

The process of closely monitoring, recording, or noticing specific behaviors, actions, or phenomena, typically as a data collection method in research.

Cohort Design

A research design that follows a group (cohort) of individuals over time to study changes and outcomes, often used in epidemiology and social sciences.