The Primary Mirror in an Astronomical Telescope Must Be a

Q21: A _ lens is thicker at the

Q22: Light spreads out when it passes through

Q23: The lens formula relating the image distance,p,to

Q24: The lens formula relating the image distance,p,to

Q25: The advantage of a convex mirror is

Q27: What makes pink ink pink?<br>A)refraction<br>B)selective absorption<br>C)dispersion<br>D)none of

Q28: In this figure a light ray travels

Q29: ​Match each item with the correct statement

Q30: A convex mirror will allow you to

Q31: Certain types of sunglasses are very effective