---
title: Under a blue lamp at a party, your red top looks almost black. Why? — Light and shadows · tree and pragmatics
description: Under a blue lamp at a party, your red top looks almost black. Why? Test 4 of lesson 20 «Light and shadows» of the physics course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Test 4 · Light and shadows

<!-- .ven lang=en -->
Under a blue lamp at a party, your red top looks almost black. Why?

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 1 · wrong ✗ · **Who acts:** red top · **What happens:** look

<!-- .vabout -->
This is test 4 of lesson 20 «Light and shadows» of the physics course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/physics/20-light-and-shadows/#t4).

## The question {#question}

<!-- .note -->
*Sentence 1:* Under a blue lamp at a party, your red top looks almost black.

```conllu
# sent_id = question:physics:20-light-and-shadows:t4:1
# text = Under a blue lamp at a party, your red top looks almost black.
1	Under	under	ADP	IN	_	4	case	_	_
2	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
3	blue	blue	ADJ	JJ	Degree=Pos	4	amod	_	_
4	lamp	lamp	NOUN	NN	Number=Sing	12	obl	_	_
5	at	at	ADP	IN	_	7	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	party	party	NOUN	NN	Number=Sing	4	nmod	_	SpaceAfter=No
8	,	,	PUNCT	,	_	4	punct	_	_
9	your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	11	nmod:poss	_	_
10	red	red	ADJ	JJ	Degree=Pos	11	amod	_	_
11	top	top	NOUN	NN	Number=Sing	12	nsubj	_	_
12	looks	look	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
13	almost	almost	ADV	RB	_	14	advmod	_	_
14	black	black	ADJ	JJ	Degree=Pos	12	xcomp	_	SpaceAfter=No
15	.	.	PUNCT	.	_	12	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **look** | present | your red top |  |  |  |  | under a blue lamp at a party; black *property* | vn peer-30.3 «NP V PP.theme»: agent=Agent under lamp=Theme |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

<!-- .note -->
*Sentence 2:* Why?

```conllu
# sent_id = question:physics:20-light-and-shadows:t4:2
# text = Why?
1	Why	why	ADV	WRB	PronType=Int	0	root	_	SpaceAfter=No
2	?	?	PUNCT	.	_	1	punct	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

## The options {#options}

### Option 1 · ✓ the right answer {#o1}

<!-- .ven lang=en -->
There is no red light for it to bounce

```conllu
# sent_id = question:physics:20-light-and-shadows:t4:o1:1
# text = There is no red light for it to bounce
1	There	there	PRON	EX	PronType=Dem	2	expl	_	_
2	is	be	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	no	no	DET	DT	PronType=Neg	5	det	_	_
4	red	red	ADJ	JJ	Degree=Pos	5	amod	_	_
5	light	light	NOUN	NN	Number=Sing	2	nsubj	_	_
6	for	for	SCONJ	IN	_	9	mark	_	_
7	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	9	nsubj	_	_
8	to	to	PART	TO	_	9	mark	_	_
9	bounce	bounce	VERB	VB	VerbForm=Inf	5	acl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **be** | present | no red light |  |  | there |  |  | vn exist-47.1 «NP V»: agent=Theme |
| 2 | **bounce** | to-infinitive | light |  |  |  |  |  | vn run-51.3.2-2 «NP V»: agent=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
The top has gone cold

```conllu
# sent_id = question:physics:20-light-and-shadows:t4:o2:1
# text = The top has gone cold
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	top	top	NOUN	NN	Number=Sing	4	nsubj	_	_
3	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	aux	_	_
4	gone	go	VERB	VBN	Tense=Past|VerbForm=Part	0	root	_	_
5	cold	cold	ADJ	JJ	Degree=Pos	4	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **go** | present · perfect | the top |  |  |  |  | cold *property* | vn disappearance-48.2-1 «NP V»: agent=Theme |

### Option 3 · ← Mova's choice {#o3}

<!-- .ven lang=en -->
Blue light dyes the cloth black

```conllu
# sent_id = question:physics:20-light-and-shadows:t4:o3:1
# text = Blue light dyes the cloth black
1	Blue	blue	ADJ	JJ	Degree=Pos	2	amod	_	_
2	light	light	NOUN	NN	Number=Sing	3	nsubj	_	_
3	dyes	dye	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	cloth	cloth	NOUN	NN	Number=Sing	3	obj	_	_
6	black	black	ADJ	JJ	Degree=Pos	3	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **dye** | present | Blue light | the cloth |  |  |  | black *property* | vn braid-41.2.2 «NP V NP»: agent=Agent cloth=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
Your eyes stop working under blue light

```conllu
# sent_id = question:physics:20-light-and-shadows:t4:o4:1
# text = Your eyes stop working under blue light
1	Your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	2	nmod:poss	_	_
2	eyes	eye	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	stop	stop	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	working	work	VERB	VBG	VerbForm=Ger	3	xcomp	_	_
5	under	under	ADP	IN	_	7	case	_	_
6	blue	blue	ADJ	JJ	Degree=Pos	7	amod	_	_
7	light	light	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stop** | present | Your eyes |  |  |  |  |  | vn stop-55.4-1-1 «NP V S\_ING»: agent=Affector clause=Eventuality |
| 2 | **work** | gerund | Your eyes *not said here* |  |  | blue light |  |  | vn employment-95.3 «NP V»: agent=Agent |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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- ← previous: [Light and shadows, test 3](https://md.mova.elamur.ai/free/en/corpora/questions/physics/20-light-and-shadows/t3/)
- next →: [Light and shadows, test 5](https://md.mova.elamur.ai/free/en/corpora/questions/physics/20-light-and-shadows/t5/)
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