{"id":4501,"date":"2025-06-29T13:34:03","date_gmt":"2025-06-29T10:34:03","guid":{"rendered":"https:\/\/shop.hippolyte.fi\/?post_type=product&#038;p=4501"},"modified":"2025-11-06T11:49:57","modified_gmt":"2025-11-06T09:49:57","slug":"petja-heiskanen-ronja-siitonen-doppler-effect","status":"publish","type":"product","link":"https:\/\/shop.hippolyte.fi\/en\/product\/petja-heiskanen-ronja-siitonen-doppler-effect\/","title":{"rendered":"Petja Heiskanen &amp; Ronja Siitonen: Doppler Effect"},"content":{"rendered":"<p><em>&#8230; An apple falling on Newton\u2019s head or a line said in a movie. A rotten apple that tastes like dirt. I bite into it in that cold frost and think of summer. &#8230;<\/em><\/p>\n<p>The Doppler effect refers to an increase or decrease in the frequency of sound, light, or other waves as the source and observer move toward or away from each other. In sound waves it can be heard in everyday life, but with light waves the effect is not observable with the human eye. In this project researchers P &amp; R try to catch the Doppler effect in its visual form with interviews, speculation, imagination and photographic methods. The publication is made up of two parallel zines (DE Documents &amp; Red Shift).<\/p>\n<p>Petja Heiskanen and Ronja Siitonen are Helsinki-based visual artists working mainly with photography, video, and text. Doppler Effect is a collaborative project in which they combine their artistic practices.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>ISBN [EN]: 978-952-65274-7-5<br \/>\nPublisher: Utu Press<br \/>\nYear: 2025<br \/>\nConcept, Photos, Texts and Research: Petja Heiskanen &amp; Ronja Siitonen<br \/>\nGraphic Design: Toivo Heinim\u00e4ki, Petja Heiskanen &amp; Ronja Siitonen<br \/>\nPrinting: T\u00f6\u00f6l\u00f6, Helsinki, Mukkula, Lahti, Kalasataman Seripaja<br \/>\nInterviewees: Antti Alkio, Vesa Korhonen &amp; Antti M\u00e4kynen<br \/>\nEdition: 100 (50 FI + 50 EN)<br \/>\nLanguage: English<br \/>\nPages: 70<br \/>\nDimensions: 30,5 x 24 cm<\/p>\n","protected":false},"featured_media":4638,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[409],"product_tag":[],"artists":[477,478],"location":[],"publisher":[410],"years":[463],"class_list":{"0":"post-4501","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-artist-books","7":"product_shipping_class-posti-xxs-max-3-x-25-x-35-cm-2kg","8":"artists-heiskanen-petja","9":"artists-siitonen-ronja","10":"publisher-utu-press","11":"years-463","13":"first","14":"outofstock","15":"taxable","16":"shipping-taxable","17":"purchasable","18":"product-type-simple"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Petja Heiskanen &amp; 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