Reflection and Refraction of Light

You're viewing free preview questions — 5 questions previewing here — subscribe to unlock 160 more, plus the Full Question Bank, Mock Papers & Worksheets.Upgrade

Reflection and Refraction of Light — Free MYP4 Physics Practice Questions

1QuestionPlane Concave and Convex MirrorsConcept Practice

2 marks~3 minCriterion C

The diagram shows parallel rays of light striking a concave mirror. After reflection, the rays pass through a single point on the principal axis.

Identify the type of mirror shown. [1]

Explain why parallel rays incident on this mirror converge at one specific point rather than being reflected in random directions. [1]

Solutions

2QuestionRay Diagrams and Image Formation BasicsAssessment Practice

5 marks~8 minCriterion A

A student investigates image formation by a converging lens of focal length

f = 10

cm. She places an object at distances

u

from the lens and records the image distance

v

u

(cm): 20.0, 15.0, 12.0, 10.0, 5.0

v

(cm): 20.0, 30.0, 60.0, undefined, −10.0

Describe the pattern relating

v

u

u

decreases from 20.0 cm to 5.0 cm. Include reference to the sign of

v

. [2]

Using the lens equation

\dfrac{1}{f} = \dfrac{1}{u} + \dfrac{1}{v}

, deduce the value of

v

when

u = 7.5

cm, and justify what the sign of your answer indicates about the image. [3]

Solutions

3QuestionLenses Converging and Diverging IntroductoryConcept Practice

2 marks~3 minCriterion A

A ray diagram shows three parallel rays of light entering a lens. After passing through the lens, the rays diverge. When extended backwards, the diverging rays appear to meet at a single point on the same side of the lens as the incoming rays.

Identify the type of lens shown and explain how the behaviour of the rays supports your answer. [1]

Deduce the name given to the point at which the extended rays appear to meet, and state whether this point is real or virtual. [1]

Solutions

4QuestionPlane Concave and Convex MirrorsAssessment Practice

6 marks~9 minCriterion B

A student investigates a concave mirror of unknown focal length

f

, where

10 \text{ cm} < f < 15 \text{ cm}

, by placing an object at distances

u =

5, 10, 15, 20, 25, and 30 cm and recording the image formed at each position.

Predict the image characteristics (real/virtual, upright/inverted, magnified/diminished) at each of the six object distances. [2]

Using your predictions, deduce a general rule that relates the type of image produced to the object's position relative to

F

and

C

. [2]

Justify your rule in part (b) by discussing the behaviour of principal rays in a concave mirror ray diagram, including what happens when reflected rays diverge rather than converge. [2]

Solutions

5QuestionRefraction Through Glass Blocks and WaterAssessment Practice

8 marks~12 minCriterion D

Anti-reflective coatings on solar panels use thin-film interference to reduce reflection losses. A magnesium fluoride layer (

n = 1.38

) is deposited on a glass substrate (

n = 1.52

). Manufacturing requires rare materials — lanthanum and hafnium — sourced from limited locations, causing environmental disruption. After 25–30 years, separating coating layers from the glass substrate during recycling is difficult. A

300\,\text{W}

solar panel operates in a location receiving

4.5

peak sun hours per day.

Use

E = Pt

, where

E

is energy in kWh,

P

is power in kW, and

t

is time in hours.

Explain how the magnesium fluoride coating reduces reflection of light with wavelength

\lambda = 550\,\text{nm}

in air. State the condition for destructive interference in terms of coating thickness

t

, wavelength

\lambda

, and refractive index

n

. [2]

The coating increases the panel's power output by

3\%

. Calculate the additional electrical energy generated per year, assuming the panel operates for 365 days. Show your working clearly. [2]

Evaluate the trade-offs involved in using advanced anti-reflective coatings on solar panels. In your response, address at least two of the following: environmental cost of mining and manufacturing; benefits of increased renewable energy generation; challenges of recycling and disposal; unequal global distribution of critical materials. Also discuss one limitation of the thin-film interference model in predicting coating performance over the panel's lifetime. [4]

Solutions

Questions 6-165

Unlock these questions with Premium

That's every free question here — 5 of 165.

+160 more questions, plus Mock Papers & Worksheets, are waiting in Premium.

Upgrade