Optik & Wellenlehre · GCSE Physics Topic 6 (Waves & Optics)

Optische Bank & Linsen-Simulator

Q: Will covering the bottom half of a lens show only half an image?

No! Every zone of the lens converges rays to form the complete image. Occluding half reduces light throughput by half, making image dimmer.

Q: How to distinguish nearsighted vs farsighted glasses by eye?

Nearsighted glasses are concave lenses (thinner center, thicker edges, diminishes views); reading glasses are convex lenses (thicker center, magnifies).

Q: When moving closer for a photograph, should the lens extend forward or retract backward?

Closer object (smaller u) produces further image (larger v). The lens must extend forward away from the sensor to keep focus.

Q: If object distance u = 2f, what is image distance and magnification?

Image distance v = 2f and magnification M = 1 (inverted equal-size real image). It serves as the benchmark to measure unknown focal length.

Optische Bank & Linsengleichung: Bildentstehung bei Konvex- und Konkavlinsen

Clientseitig
Keine Anmeldung
Echtzeit-Herleitung
Projektormodus
A4-Arbeitsblatt

Lokale Berechnung · Privat

3D-Simulationsfenster● 60 FPS

Geschwindigkeit:

Voreinstellungen & typische Fallen:

Experimentelle Steuerungsparameter

Brennweite f

Gegenstandsweite u

Gegenstandshöhe h0

Abdeckmodus

Echtzeit-Herleitung & Kennzahlen

Bildweite v

Vergrößerung M

Bildeigenschaften

Praktisches Gerät

Echtzeit-Formelherleitung

Grundformel: --

Einsetzungsschritte: --

Physikalischer Zustand: --

Typische Beispielaufgaben & Prüfungsfallen

Worked Problem

Aufgabe: A convex lens with f=10cm has a candle at u=15cm. What are the image characteristics and image distance v?

Schrittweise Herleitung:

1/f = 1/u + 1/v => 1/10 = 1/15 + 1/v => v = 30cm. Since f < u < 2f, image is inverted, magnified and real.

Worked Problem

Aufgabe: To observe an upright magnified virtual image using a convex lens of f=10cm, what range must object distance u satisfy?

Schrittweise Herleitung:

Upright virtual images require object inside focal length (u < f). Distance must be between 0 and 10cm.

Arbeitsblatt für den Unterricht & Hausaufgaben

Q1. Variant 1: As candle burns shorter, which way does the image shift on the screen? How to re-center it?

Q2. Variant 2: Why might an image fail to appear on the screen despite moving it along the bench? (List 3)

Q3. Variant 3: How do parallel rays refract through a concave lens? Which vision defect does it correct?

Häufige Fragen & typische Missverständnisse

Will covering the bottom half of a lens show only half an image?

No! Every zone of the lens converges rays to form the complete image. Occluding half reduces light throughput by half, making image dimmer.

How to distinguish nearsighted vs farsighted glasses by eye?

Nearsighted glasses are concave lenses (thinner center, thicker edges, diminishes views); reading glasses are convex lenses (thicker center, magnifies).

When moving closer for a photograph, should the lens extend forward or retract backward?

Closer object (smaller u) produces further image (larger v). The lens must extend forward away from the sensor to keep focus.

If object distance u = 2f, what is image distance and magnification?

Image distance v = 2f and magnification M = 1 (inverted equal-size real image). It serves as the benchmark to measure unknown focal length.