Class 10| Refraction of light | convex lens| science

The convex lens is used in-

If the behavior of light rays through a convex lens is as shown in the adjoining figure, then

When monochromatic red light is used instead of blue light in a convex lens, its focal length will :-

A convex lens of focal length 100 cm and a concave lens of focal length 10 cm are placed coaxialiy at a separation of 90 cm. If a parallel beam of light is incident on convex lens, then after passing through the two lenses the beam

A convex lens of focal length 20cm and a concave lens of focal length f are mounted coaxially 5cm apart. Parallel beam of light incident on the convex lens emerges from the concave lens as a parallel beam. Then, f in cm is

Draw a diagram to show refraction of a plane wave front incident in a convex lens and hence draw the refracted wave front

A beam of light converges at a point P. Now a convex lens is placed in the part of the converngent beam at 15 cm from P. At what point does a beam converge if the convex lens has a focad length 10 cm ?

A glass or glycerin convex lens of refractive index 3//2 has got a focal length equal to 50 cm. Find the focal length of the lens, if it is immersed in ethyl alcohol of refractive index 1.36.

Class 10 science bio ch 3 lec 1

An object is placed 30cm away from a convex lens of focal length 10cm and a sharp image is formed on a screen. Now, a convex lens is placed In contact with the convex lens. The screen now has to be moved by 45cm to get a sharp image again. The magnitude of focal length of the convex lends in (in cm)