virtual image (optics)
Tone colorsmāmámǎmàma
Meanings
1 sense · 3 examplesnoun
virtual image (in optics): an image formed by the apparent divergence of light rays, which cannot be projected on a screen or captured on photographic film
technicalIn optics, virtual images cannot be projected onto a screen because the light rays do not actually converge at the image location. They appear to come from a point behind the mirror or lens. Contrast with 'real image' (实像).
Píng平
miàn面
jìng镜
xíng形
chéng成
de的
xiàng像
shì是
xū虚
xiàng像
。
The image formed by a plane mirror is a virtual image.
Dāng当
wù物
tǐ体
wèi位
yú于
tū凸
tòu透
jìng镜
de的
jiāo焦
diǎn点
yǐ以
nèi内
shí时
，
huì会
xíng形
chéng成
fàng放
dà大
de的
xū虚
xiàng像
。
When an object is placed inside the focal point of a convex lens, an enlarged virtual image is formed.
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Xū虚
xiàng像
bù不
néng能
yòng用
píng屏
mù幕
chéng承
jiē接
，
dàn但
kě可
yǐ以
yòng用
yǎn眼
jing睛
zhí直
jiē接
guān观
chá察
。
A virtual image cannot be captured on a screen, but it can be viewed directly with the eye.