What happens when a ray of light enters a glass slab ?​

When a ray of light enters a glass slab from air then its speed decreases as it encounters a dense medium

Explanation:

then the

speed decreases

colorectal cancer may also develop from areas of abnormal cells in the lining of the colon or rectum. this area of abnormal cells is called dysplasia and is more commonly seen in people with certain inflammatory diseases of the bowel such as crohn's disease or ulcerative colitis.

thermal energy is the answer