An object is placed in front of a concave mirror with a focal length of . Where is the image formed?
Answer and explanation
Correct answer: C. in front of the mirror (real image)
- Step 1: Use mirror formula: .
- Step 2: Substitute and :
- Step 3: .
- Step 4: Therefore . The positive sign denotes a real image formed on the same side in front of the mirror.
Answer
30\text{ cm} in front of the mirror (real image).
Why not the others: '' adds fractions without common denominator; ' behind the mirror' would be virtual with negative image distance; '' assumes object at center of curvature ().
Practise more Physical Sciences and Chemical Systems.
Free questions with an explanation for every one, and full timed Egyptian STEM Schools Admissions Assessment mock tests.
More Physical Sciences and Chemical Systems questions
- A solid wooden cube of side and density floats in pure water (density ). What depth of…
- What is the balanced stoichiometric coefficient of when propane () undergoes complete combustion to produce carbon dioxide and…
- A cart of mass traveling at collides with a stationary cart of mass . If they couple together afte…
- Which type of chemical bond is formed when two atoms share valence electrons equally due to identical or negligible electronegativity differ…
- An electric circuit contains three resistors of resistances , and connected in parallel across a…
- What is the molar mass of sulfuric acid ()? (Atomic masses: )