Optics Answers

I read that light travels as wave and as particles also. Does it mean that photons travel in a path that is like a wave? (Is the path of the photons is like a wave)

A bug-a-boo is located d1 = 22.0 cm in front of a -7.5 dp lens. Another +6.0 dp lens is located d2 = 25.0 cm from the first lens as indicated in the figure. Locate the position of the final image of the system

Image: https://general.physics.rutgers.edu/gifs/CJ/26-1.gif

(a)
Suppose you walk towards a mirror at 1.0m/s.How fast do you and your image approach each other?Explain how you arrive at your answer
(b)What is the purpose of drawing a tangent to the curved surface at the point of incidence and why?

A pulsating source for a spherical wave vibrates at a frequency of 1MHz. Calculate the how far the
wave travels at an instant assuming it has traveled unobstructed in free space at a speed of light
(c=3E-3 meters/second).

an object 2cm tall is placed 40cm from a convex lens of focal length 15cm. find the position, nature and size of the image. {hint: object beyond 2F , image is between F and 2F ,real ,smaller }

I am doing an experiment to investigate the critical angle of a semi-circular Perspex block. The results I collected were the angles of incidence and refraction and I used these to calculate the refractive index and hence the critical angle but I don't know what to write to conclude this experiment (in detail) as this is for an assessment - what exactly does Snell's Law prove here? Thanks

A ray of light strikes a mirror at an angle of 24◦ to the normal.
What is the angle of reflection?

A magnifying glass is a convex lens of a focal length 10cm. At what distance
should this magnifying glass be held so that the numbers in a name card
appear to be twice their size?