Q- A swimmer sees only hazy contours of objects when he opens his eyes under water, while they are distinct when using a mask. Why?Chapter: LightView Answer
Q- The image of an object formed by a convex is obtained on a screen. Will the full size of image be obtained if the lower half of the is made completely opaque? Chapter: LightView Answer
Q- If a piece of paper is held at the position of the virtual image of a strong light source, will the paper burn after sufficient time? What happens if the image is real? What happens if the image is real but the source is virtual? Chapter: LightView Answer
Q- Do the focal lengths of lens and mirror depend on the colour of light ray? Chapter: LightView Answer
Q- Why does a convex lens of glass (µ=1.5)behave as a diverging lens when it is immersed in a liquid of R.l.= 1.8? Chapter: LightView Answer
Q- In the spectrum of white light, name two colours whose deviations are more than that of the green colour. Chapter: LightView Answer