Ok well think about how we use adjectives normally in sentences. There are two main ways of using an adjective in a sentence to describe a noun.
You can use it as an 'attributive adjective' - i.e. one that comes right in front of the noun- e.g. 'the red coat', 'the wrong word' etc.
Or you can use it as a 'predicate adjective' - one that comes after the noun, following a verb (usually the verb 'to be', but sometimes other verbs of seeming, looking, appearing, for example, e.g. 'the coat is/was/seems/looked red'.
Word order is very important in English. The job a word does in a sentence is sometimes only apparent from its position in the sentence, unlike in other languages, where things like cases, adjective endings etc would make the meaning clear even if you mixed up the word order. For example if you say 'The dog bit the man", it's only the word order that tells you who was bitten and who was biting. In German you could tell whichever way around they were.
Adjectives don't really go straight after nouns with no verb in between.
I'm trying to think of some examples where they do. For example you could say "He declared the plate empty", but that's a slightly unusual structure and, arguably, there is an understood 'to be' in there. Or there's the 'writ large' example, which is, again, unusual and idiomatic (but I'd probably argue that 'large' was being used as an adverb there anyway).
I should add... I am not an English teacher (most secondary school Emglish teachers don't seem to know much about this stuff anyway!), just a French, German and Spanish teacher with a general interest in grammar.