Light Topic – Flash

What kind of image is formed by a convex lens when the object is beyond the focal length?

What is the angle between the incident ray and the normal called?

What do we call the bending of light when it passes from one medium to another?

What causes the phenomenon of mirage?

What is the principle behind the working of a periscope?

The ratio of size of the image to the size of the object is called ____.

Which lens is used for farsightedness?

With what is the intensity of light measured?

What is the term for light emitted by an object at high temperature?

Twinkling of star is due to ____.

The incident ray, the reflected ray, and the normal to the mirror at the point of incidence all lie in the ____.

What is the image called that can be projected on a screen?

What causes a star to shine on its own light?

Which lens is used in a simple microscope?

What is the name of the focal point on the opposite side of a convex lens?

What causes the dispersion of white light?

What is the term for the image seen in a plane mirror?

What causes optical illusions like mirages?

Convex mirror is used in ____.

In which order are the colours in the rainbow?

What causes the sun to appear red during sunrise and sunset?

What is the term used when light bounces off a surface?

Rainbow is caused by ____.

What type of lens is used to spread out light rays?

What causes the shimmering effect seen on hot roads during summer?

Light speed is ____.

What type of lens is used in spectacles for correcting myopia?

What is the normal line in reflection and refraction?

Due to refraction from Earth’s atmosphere, the stars appear to ____.

What is the name of the optical instrument used to measure angles of incidence and refraction?

Light incident on a glass prism disperses into seven colours in this sequence: ____.

What is the relationship between magnification (M), image distance (v), and object distance (u)?

What is the critical angle?

Person suffering from myopia uses ____.

What is the optical center of a lens?

What is the term for light waves vibrating in one plane only?

Which lens is thinner at the center than at the edges?

Which mirror is used in vehicle headlights to produce a parallel beam of light?

What property of light causes it to travel in a straight line?

What is the name of the line that passes through the center of curvature and the pole of a mirror?

What is total internal reflection?

What happens to light when it passes from air to glass?

What is the phenomenon when light waves overlap and combine?

What is the name of the angle between the refracted ray and the normal?

The main source of heat is the ____.

The Sun is visible about ____. before the actual sunrise because of refraction.

Name the defect of eye in which a person cannot simultaneously focus on both horizontal and vertical lines?

What type of image does a convex mirror always produce?

What is the name of the lens used in a camera?

What phenomenon causes the blue color of the ocean?

What is the lens formula?

Concave lens is called a ____.

What is the term for bending of light around edges or obstacles?

Focal length is the distance between ____.

What is the term for the distance between the optical center and the principal focus of a lens?

What causes the apparent displacement of an object submerged in water?

If Earth did not have an atmosphere, the sky would be ____.

Photoelectric effect was explained by ____.

Sunlight becomes visible in a room due to ____.

The primary source of light is ____.

What is a light year?

Which instrument uses a combination of lenses to magnify faraway objects?

The image formed by a convex mirror is always ____.

What is the point called where the rays of light meet after reflection or refraction?

The line passing through midpoint of lens and principal axis is called ____.

What is the dark spot on the retina called where the optic nerve leaves the eye?

If the image of an object is small and real, the lens used will be ____.

What is the term for the bright central spot seen in the interference pattern of light?

What is the name of the lens used in corrective glasses for hypermetropia?

What optical device is used to split light into its component colors?

What is the function of the cornea in the human eye?

Sparkling of diamond, mirage, looming, shining of air bubbles in water, and optical fiber are examples of ____.

What kind of mirror is used in vehicle side mirrors?

What is the principle used in microscopes to magnify objects?

Which mirror is used for rear view in cars?

What type of wave is light?

What happens to light intensity as it passes through a polarizer?

The device which converts solar energy into electrical energy is called ____.

What kind of image does a convex lens form when the object is between the lens and focal point?

Type of image formed in a concave mirror?

Which law states that the angle of incidence equals the angle of reflection?

Light after reflection meets at a point on the principal axis called ____.

What is the angle called between the incident ray and the reflected ray?

What type of mirror is used in shaving mirrors?

Light is a ____.

What optical instrument is used to study microscopic organisms?

Which of the following is used as a magnifying glass?

What is the unit of luminous intensity?

What is the shape of a concave lens?

Which instrument is used to see heavenly bodies?

What is the term for a device that separates light into colors by refraction?

For what reason does the color of the sky appear blue?

A spherical mirror whose reflecting surface is curved inwards is called a ____.

What is the relationship between the radius of curvature (R) and focal length (f) of a mirror?

Which part of the eye adjusts the size of the pupil?

What is the unit of power of a lens?

How long does it take for the rays of sun to reach Earth?

Which property of light causes rainbows to form?

Which mirror is used in solar furnaces to focus sunlight?

Out of all nuclear radiation, the most damaging radiation is ____.

Which part of the eye contains photoreceptor cells?

What happens to light speed as it passes from air into glass?

Sun is the source of ____.

What is the point called where rays parallel to the principal axis converge in a concave mirror?

Power of a lens is measured in which of the following?

Right appears left and left appears right in mirror; this is called ____.

Convex lens is called a ____.

Which is not a primary colour?

The visible light has wavelengths between ____.

What kind of image is formed by a plane mirror?

Which color of light bends the least during refraction?

When sunlight comes out of the prism, which color deviates the most?

Astigmatism is corrected with ____.

The midpoint of a spherical mirror is called ____.

What type of mirror is used to produce a magnified image in makeup mirrors?

The image formed by a concave mirror is generally ____.

What is the blind spot in the eye?

What is the image distance if the object is at infinity for a convex lens?

What will the red ribbon look like in green light?

The sky appears blue because of ____.

What kind of wave is light classified as?

Which color of light has the highest frequency?

What is the transparent part of the eye through which light enters?

What happens to the focal length of a lens if it is made thicker?

What type of lens is used in a projector to enlarge images?

Electrical energy is converted into what inside a photocell?

Bending of light rays when travelling from one transparent medium to another is called ____.

What kind of image is formed by a convex mirror?

What is the function of the pupil in the human eye?

What is the speed of light in water compared to air?

What is the phenomenon called when light bends around obstacles?

What is the term for the path followed by light?

What is the effect called when white light splits into colors after passing through a prism?

What is the term for light traveling in all directions equally?

Person suffering from hypermetropia uses ____.

A coin appears at a ____.

Sky is blue because of ____.

What is the speed of light in vacuum?

Concave mirror is used in ____.

Optics is a branch of physics that deals with the study of ____.

What property of light allows us to see objects around us?

What is the minimum distance at which a normal eye can see an object clearly?

What is the unit used to measure the focal length of a lens?

Light is a form of ____.

Which device uses refraction to correct vision defects?

What is the device called that uses two lenses to magnify distant objects?

How many colors are there in sunlight?

An eclipse of Sun takes place when the moon passes between the ____.

The angle of incidence is equal to the ____.

What is the principal focus of a concave mirror?

What happens to light rays when they pass through a concave lens?

What phenomenon causes the twinkling of stars?

What is the effect of increasing wavelength on the diffraction of light?

What is the function of the retina in the eye?

Which part of the eye controls the amount of light entering?

What phenomenon causes a straw in a glass of water to appear bent?

Isaac Newton discovered white light consists of ____.

Which color of light has the shortest wavelength in visible spectrum?

What kind of image does a plane mirror form?

What is the range of visible light wavelengths in nanometers?

What is the main cause of shadows?

Primary colors are ____, ____, and ____?

Red has the lowest ____. and the highest ____.

How long does it take for sunlight to reach the surface of the earth?