Q#15: Can you solve the mystery of this t-shirt? Winners Announced

April19, 2021
by Apoorva
3 min read

Dear School leaders,
For MTLT#15, we asked you this question:

Which of the two ray diagrams correctly describes the light rays coming into your eyes from the t-shirt?
Given that you are able to see the t-shirts completely.

(A) Case I
(B) Case II
(C) Both the cases are true

Correct Answer and Explanation:

The correct answer is Option (B).

Black color objects absorbs light so no relected light will come from the black portion of the cloth. Infact, the absence of light makes it black.

The blue portion of the cloth absorbs all the color except blue. Rather it reflects blue. Similar with the orange portion of the cloth.

How school leaders responded?

Lucky Draw Winners

1. Dr Archana Mishra, Navrachana Vidyani Vidyalaya Vadodara 👏
2. Dr S Srinivasan, Indian School, Sur 👏
3. Tessy, S St.John’s High School 👏

Would you like to know how Open Door can help your children think with similar beautiful questions?

Share this question with your friends:


    Apply for Position

    Upload your Resume/CV *

          Rules & Instructions:


          1. Create a video of less than 5 minutes.
          2. Size of video should be less than 100MB while uploading.
          3. You can use one Voucher Code to upload video only once.
          4. You can use animations and other visual effects to help improve presentation.
          5. The video should have the student who won the voucher as the primary explainer.


          1. Explanation (10 points)
          (i) Accuracy of explanation or relevant explanation of the given challenge.
          (ii) Explanation of ALL the questions asked.

          2. Presentation (5 points)
          (i) Video should not exceed given time constraints.
          (ii) It should be understandable.
          (iii) Good use of props and effects.

          3. Early-bird
          (i) The first 1000 entries will get bonus points for submitting early.

          Note: Open Door will not entertain requests to share scores.