Pasco OS-8532 CONCAVE MIRROR ACCESSORY Manuel d'utilisateur télécharger pdf (Page 2)

Concave Mirror for Basic Optics 012-06528A

EQUIPMENT NEEDED

– Concave Mirror – Half-Screen

– Optics Bench (from OS-8515) – Light Source (from OS-8515)

Purpose

The purpose of this experiment is to measure the focal length of a concave mirror.

Procedure

1. Mount the Light Source at one end of the Optics Bench. Place the Concave Mirror at the other end of the Optics

Bench.

2. Position the Light Source so the crossed arrow target is aimed at the Concave Mirror and the concave surface of

the mirror faces the light source.

3. Place the Half-Screen a few centimeters in front of the Concave Mirror (between the mirror and the Light

Source).

4. Move the Half-Screen closer to or farther from the Concave Mirror until the reflected image of the crossed

arrow target on the white screen is focused.

5. Measure the distance between the position indicators on the Half-Screen and the Concave Mirror.

Experiment : Focal Length of a Concave Mirror

PASCO

tic

s B

POWER SUPPLY JACK

12V @ 800mA

LIGHT

SOURCE

TO REPLACE BULB SEE

INSTRUCTION MANUAL.

BULB: 12V 10W G-4

DO NOT TOUCH BULB

WITH FINGERS.

DISCONNECT POWER

BEFORE CHANGING BULB.

TO REMOVE LIGHT SOURCE

GENTLY SPREAD BRACKET.

Optics Bench

Light Source

Half-Screen

Concave Mirror

crossed arrow target

Figure 3: Experiment Setup

example: image on

Half-Screen

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Pasco OS-8532 CONCAVE MIRROR ACCESSORY Manuel d'utilisateur Page 2