Optical Illusions
-
Code:9780241549377
-
Weight:0.788 Kgs
From the classic "which dot is bigger?" or "is this line straight?" illusions to the first-ever 3D trick to appear in a book, Optical Illusions is packed with picture puzzles. Every illusion is set up to challenge what you think you see. There are hints and tips of how to approach the illusion, and then an explanation of how it works and why you were fooled (and you will be!). There are also flaps, tabs, and a decoder to test the answers, so you can check whether different-looking colours are actually the same, or if those lines really are wonky.
All kinds of visual tricks are featured, including distortion, motion, colour and brightness, ambiguous illusions, impossible objects, hidden images... but the stars of the show are two large interactive illusions - the "thaumatrope" spinner that puts a bird in a cage, and a 3D perspective sculpture. Even though you will build it yourself and know which bits pop out and which parts are flat, you can't help but see them the other way around.
Optical Illusions will get you lifting flaps and turning tabs in your quest to see the truth behind the illusion - and the more you discover, the more impressive the illusion becomes.
Terms & Conditions
Terms of Use briefly
You can find a book that interests you browsing the categories or using the search engine.
Site registration is not mandatory.
The delivery cost to Bulgaria is fixed and does not depend on the number and weight of the books ordered - 5.90 lv for a courier delivery and 4.90 lv to Econt office. Orders over 42.00 lv are delivered for free if the order is dispatched at once. In cases where the order is over 42.00 lv and part of the books are with 30 or 60-day-delilvery term, then the free delivery is applied to the books in stock, and the rest is dispatched with the usual price - 5.90 lv for a courier delivery and 4.90 lv to Econt office. If the customer wants to have all the books dispatched together, then they should request that in the Special Instructions field.
Usual delivery time - 2-3 working days for items in stock.
- for individual orders - 20 days for English titles and 25 days for German titles.
Prolonged delivery time - rarely needed up to 20 days for delivery of books available online and up to two months for individual orders. In these cases the customer is promptly informed about the changes in the delivery time.
We accept payment by cash - paid to the courier upon receipt of the books and bank transfer.
Please contact us for further details if you wish to pay with a bank tansfer.
The amount you pay is equal to the price of the ordered goods with delivery costs. This amount represents an advance in the sense of Art. 53, par. 1 of the Law on Consumer Protection, for which you give consent by clicking the "Finalize order" button.
Returns
You may return your order within 14 days from the day of purchase, under the following conditions:
1. The book is intact, without injuries, scratches or external damage;
2. There are no torn pages;
3. There are no damages caused by the customer due to careless transportation or misuse;
4. Where there are supplies or accessories included, they are intact in their original packaging;
5. The transportation costs for the return of the order are covered by the customer.
