A Plano-Convex Glass (N = 1

question 74

Multiple Choice

A plano-convex glass (n = 1.5) lens has a curved side whose radius is 50 cm.If the image size is to be the same as the object size, the object should be placed at a distance from the lens of:

• A)50 cm
• B)100 cm
• C)200 cm
• D)340 cm
• E)400 cm

---

Definitions:

Hallucinogens

Substances that cause profound changes in perception, thought, and mood, often leading to visual or auditory hallucinations.

Depressants

Substances that reduce the activity of the central nervous system, leading to relaxation, reduced anxiety, and sleepiness.

Stimulants

Substances that increase arousal, attention, and energy by enhancing the activity of certain neurotransmitters in the brain.

Psychological Health

A state of well-being in which an individual recognizes their own abilities, can cope with the normal stresses of life, work productively, and contribute to their community.