Light

An arc of seven colours seen in the sky is known as
1. prism
2. spectrum of white light
3. rainbow
The band of seven colours formed on a white screen, when a beam of white light is passed through a glass prism, is known as
1. rainbow
2. prism
3. spectrum of white light
Which lens is thicker in the middle and thinner at tho edges?
1. concave mirror
2. both concave and convex lens
3. concave lens
4. convex lens
Which lens is thicker at the edges and thinner at the middle?
1. concave lens
2. convex lens
3. both concave and convex lens
4. convex mirror
The seven colours of rainbow are
1. violet, white, blue, green, yellow, orange and black
2. violet, indigo, blue, green, yellow, orange and red
3. violet, indigo, gold, green, yellow, orange and red
4. violet, indigo, blue, white, yellow, orange and red
We can obtain a real, enlarged and inverted image by a
1. concave lens
2. convex mirror
3. concave mirror
4. convex lens
A virtual image larger than the object can be produced by a
1. plane mirror
2. convex mirror
3. concave mirror
4. concave lens
David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be
1. 5 m
2. 6 m
3. 2 m
4. 0.5 m
The rear view mirror of a car is a plane mirror. A driver is reversing his car at a speed of 2 mts. The driver sees in his rear view mirror the image of a truck
behind his car. The speed at which the image of the truck approach the driver will be
1. 8 m/s
2. 7 m/s
3. 4 m/s
4. 2 m/s
Light travels in a straight line; this property is called
1. refraction of light
2. reflection of light
3. rectilinear propagation of light
4. spectrum of white light

Light

Quiz