Question : Why does a black board appears black in colour?
Option 1: It reflects black colour
Option 2: It absorbs black colour
Option 3: It reflects all colours
Option 4: It absorbs all the colours
Latest: SSC CGL preparation tips to crack the exam
Don't Miss: SSC CGL complete guide
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: It absorbs all the colours
Solution : The correct option is it absorbs all colours.
When light, which is a blend of different wavelengths that correspond to different colors hits the blackboard, a sizeable percentage of it is absorbed, and very little of it is reflected. The surface's characteristically dark look, which we interpret as black, is caused by the absence of reflected light. Usually a body appears black because it absorbs all the light radiations and reflects a very small portion of it.
Candidates can download this ebook to know all about SSC CGL.
Admit Card | Eligibility | Application | Selection Process | Preparation Tips | Result | Answer Key
Question : The colour of the ocean appears to be blue because the sunlight falling on it is:
Question : In a coloured picture of blue and yellow colours, blue and yellow colours are used in the ratio of 4 : 3, respectively. If in the upper half, blue : yellow is 2 : 3, then in the lower half, blue : yellow is:
Question : The purpose of an optical filter is to___________.
Question : Directions: Two different positions of the same dice have different colours - White, Red, Blue, Yellow, Green, and Black - written on them. Identify the colour on the face opposite the face showing Blue.
Question : Rini has mixed two colours 'C1' and 'C2' in the ratio 2 : 3. If the rate of the colour 'C1' is INR 500 per unit and she is selling the mixture of the two colours at INR 650 per unit at a breakeven price, then what is the
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile