Change set

Pick exam & year, then Go.

Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q100 (IAS/1994) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Geometrical optics Answer Verified

The colour of an opaque object is due to the colour it

Result
Your answer: —  ·  Correct: C
Explanation

The colour of an opaque object arises from the wavelengths of visible light that it returns to the eye — in other words, the light it reflects. When white light strikes an object, certain wavelengths are absorbed by the material while others are reflected; the reflected spectral components determine the colour we perceive [1]. Opaque materials do not transmit light, so refraction/transmission are not responsible for their apparent colour. Scattering can affect appearance for particulate or very rough surfaces, but for most solid opaque objects the dominant factor is the reflectance (including diffuse reflection) spectrum, with absorbed wavelengths removed from the reflected light [2]. Therefore, the correct choice is: reflects.

Sources

  1. [1] Science , class X (NCERT 2025 ed.) > Chapter 9: Light – Reflection and Refraction > p. 134
  2. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 21: Horizontal Distribution of Temperature > Transparency of Atmosphere > p. 283
How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
42%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

CAPF · 2014 · Q112 Relevance score: 3.73

Match List I with List II and select the correct answer using the code given below the Lists : , List I (Explanation) A. Colour of an opaque object B. Colour observed through a coloured glass C. Bending of the image of a rod partially dipped in water D. Shining observed when one steps on an earthworm List II (Term) I. Fluorescence 2. Reflection 3. Transmission 4. Refraction Code : A B C D

CDS-II · 2013 · Q26 Relevance score: 3.10

A ray of white light strikes the surface of an object. If all the colours are reflected the surface would appear :

CDS-I · 2011 · Q19 Relevance score: 1.75

The blackboard seems black because it

CAPF · 2022 · Q23 Relevance score: -0.69

The optical phenomenon responsible for the blue color of sky is

NDA-II · 2014 · Q28 Relevance score: -0.99

Light waves projected on oil surface show seven colours due to the phenomenon of