• Question: What has an eye but cannot see?
• Answer: A needle.
• Question: What is always in front of you but can’t be seen?
• Answer: The future.
• Question: What can travel around the world while staying in a corner?
• Answer: A stamp.
• Question: What can you see but never touch or hold?
• Answer: Your reflection.
• Question: I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?
• Answer: A map.
• Question: What has keys but can’t open locks?
• Answer: A piano.
• Question: What has a head, a tail, is brown, and has no legs?
• Answer: A penny.
• Question: What is full of holes but still holds water?
• Answer: A sponge.
• Question: What has many keys but can’t open any locks?
• Answer: A keyboard.
• Question: What has one eye but can’t see?
• Answer: A cyclone.
• Question: What has a mouth but never eats, has a bed but never sleeps?
• Answer: A river.
• Question: I’m not alive, but I can grow. I don’t have lungs, but I need air. What am I?
• Answer: Fire.
• Question: What can fill a room but takes up no space?
• Answer: Light.
• Question: What has a neck but no head?
• Answer: A bottle.
• Question: What has an ear but cannot hear?
• Answer: A cornfield.
• Question: What has keys that open no locks, space but no room, and allows you to enter but not go inside?
• Answer: A keyboard.
• Question: What has many eyes but can’t see?
• Answer: A potato.
• Question: What can run but never walks, has a mouth but never talks, has a head but never weeps, and has a bed but never sleeps?
• Answer: A river.

• What has a thousand eyes but can’t see?
• Answer: A kaleidoscope.
• What bends light but doesn’t break it?
• Answer: A prism.
• What has a lens but can’t take pictures?
• Answer: Eyeglasses.
• What can make the world upside down without moving?
• Answer: A magnifying glass.
• What has a cornea but no body?
• Answer: A camera.
• What reflects without a mirror?
• Answer: Water droplets.
• What sees all but never speaks?
• Answer: A surveillance camera.
• What has a pupil but never learns?
• Answer: A black hole.
• What can see through walls?
• Answer: X-rays.
• What can create rainbows without rain?
• Answer: A prism.
• What has a lens but isn’t a camera?
• Answer: A telescope.
• What can focus without a mind?
• Answer: A magnifying glass.
• What can see through time?
• Answer: Hindsight.
• What has rods and cones but isn’t an eye?
• Answer: A sensor.
• What has a view but no window?
• Answer: A telescope.
• What can see in the dark but isn’t a cat?
• Answer: Night vision goggles.
• What can see around corners?
• Answer: Periscope.
• What sees best when it’s dark?
• Answer: Infrared camera.

Another Optical riddles

• What has a lens but doesn’t need glasses?
• Answer: A projector.
• What has a mirror but isn’t a reflection?
• Answer: A periscope.
• What can see the smallest of details?
• Answer: Microscope.
• What can see through the thickness of the earth?
• Answer: Ground-penetrating radar.
• What can see through the depths of the ocean?
• Answer: Sonar.
• What can capture images in the blink of an eye?
• Answer: High-speed camera.
• What can see around corners without peeking?
• Answer: Fiber optic camera.
• What can see the stars up close?
• Answer: Space telescope.
• What can see heat without touching?
• Answer: Thermal imaging camera.
• What can see inside the human body?
• Answer: MRI machine.
• What can see patterns in DNA?
• Answer: DNA sequencer.
• What can see the structure of molecules?
• Answer: Atomic force microscope.
• What can see the velocity of particles?
• Answer: Particle accelerator.
• What can see the spectrum of light?
• Answer: Spectrometer.
• What can see the trajectory of projectiles?
• Answer: Ballistic camera.
• What can see the heart’s rhythm?
• Answer: Electrocardiogram (ECG).

• What has a lens but doesn’t capture images?
• Answer: Binoculars.
• What can see through walls without X-rays?
• Answer: Ground-penetrating radar.
• What has a viewfinder but isn’t a camera?
• Answer: Virtual reality headset.
• What can see the smallest particles in the universe?
• Answer: Electron microscope.
• What can see the path of light?
• Answer: Laser interferometer.
• What can see colors beyond the human spectrum?
• Answer: Ultraviolet camera.
• What has a lens but isn’t a magnifying glass?
• Answer: A telescope.
• What can see around corners with sound waves?
• Answer: Sonar.
• What can see the depths of the ocean without diving?
• Answer: Submarine periscope.
• What can see the motion of stars over centuries?
• Answer: Astrolabe.
• What has a lens but isn’t a pair of glasses?
• Answer: A camera obscura.
• What can see the structure of crystals?
• Answer: X-ray crystallography.
• What can see the world from miles above?
• Answer: Satellite imaging.
• What can see the flow of blood through veins?
• Answer: Doppler ultrasound.
• What can see the intricate details of circuitry?
• Answer: Electron microscope.

Getting over with Optical riddles

• What has lenses but can’t see?
• What is always in front of you but can never be reached?
• What is transparent, yet never lets light through?
• What bends light without breaking it?
• What has a pupil but can’t learn?
• What has a cornea but can’t blink?
• What is as clear as glass but weighs nothing?
• What can focus on the smallest details without eyes?
• What reflects everything it sees, but is never seen itself?
• What has rods and cones but isn’t an eye?
• What is as thin as a strand of hair but can manipulate light?
• What can create rainbows without water or prisms?
• What is a silent observer in every room?
• What can create illusions without magic?
• What can magnify without the need for a lens?
• What has a field of view but no depth perception?
• What can distort images without Photoshop?
• What can split light without a knife?
• What can make objects disappear without invisibility?
• What can project images without a screen?